Discrimation at Pizza Del Forno on Date Night special

On Wednesday, 21 August, my partner and I went out to the Mulberton restaurant to enjoy our Wednesday dinner. We decided on the Date Night dinner special advertised on your website. On arrival, we were greeted with a friendly smile which made us feel that our evening would be great, however this soon changed. Upon being ushered to our table by our waiter Khumbu, we mentioned that we would like to order and enjoy the Date night special. He then expressed upon "Date night" with uncer*****y. This now gets interesting and I then rep**** with a resounding YES, the Date night special as mentioned on the website. As my partner and I are two guys, he continued to exclaim this expression with a gesture that "Date Night" and at this point it seemed he wanted to say something further to our situation "2 guys wanting the Date night special". We ignored this expression and asked him to proceed to with the order, however at this point I felt uncomfortable and actually mentioned to my partner that had the waiter continued with this expression, I would have asked for the manager and a different waiter. He did as we requested and brought out the wine, starter - shared as per special, 2 mains of rump with extra sauces and dessert - shared as per special. During the evening, he had again become pleasant. By the end of our evening which we now had decided to forgive his little ignorance at the beginning of our dinner, we asked him to bring us our bill to settle. When he brough the bill, the amount on the bill was R477 - with itemised billing for each item. We called him to query this as yet again, we had expressed at the beginning of our dinner that we would like the Date night special as advertised which he was well aware of since he made his little rant and remarks earlier. He apologised and took the bill and said that he would correct it. THIS IS WHERE IT ALL THEN BECAME INTERESTING, EMBARRASING, UPSETTING AND ALL-TOGETHER SPOILED OUR EVENING FURTHER. Instead of Khumbu bringing back the correct bill as per the special of R289 plus 2 extra sauces, Donovan who introduced himself as one of the management team came over with the same bill and said that he needed to clarify to us the "Date Night special" is ONLY APPLICABLE FOR COUPLES. AT THIS POINT I FELT RATHER INSULTED AND WONDERED WHY WOULD I BE QUESTIONED ABOUT THE SPECIAL AND BEING A COUPLE WITH MY PARTNER. I firstly questioned Donovan whether he understood what A COUPLE is which by definition first and foremost would mean 2 PEOPLE!!! I then informed him that I am in no position nor obliged to explain myself and who my partner is AS THIS NOW FEELS I AM BEING QUESTIONED AS TO WHO IS IT THAT I AM INTIMATE WITH. I asked him whether it would have been comfortable for him whether we were man and woman, is that the intention of the special and THIS IS THE CLARITY I WOULD LIKE TO OBTAIN FROM PIZZA DEL FORNO? I asked him whether he would prevent 2 women, being sisters, friends or *****s by definition of a couple to him to enjoy the special. He mentioned that there are terms and conditions and that the Date night special is a COUPLES ONLY SPECIAL. I again explained that a couple means 2 and if Pizza Del Forno's policy on this special stipulates male and female then the terms and conditions should state such. I told him that I even further read the terms and conditions on the website to clarify on the inclusions and exclusions of the special. Donovan eventually conceded and amended the bill however we refused to offer a tip which then Khumbu felt that we were being unfair about, REALLY????? From this experience, I will not be returning to this store and further want Pizza Del Forno to explain the terms and conditions of the special on their website whether the intention of Date night special is limited to a SAME *** AND INTIMATE COUPLES ONLY? We live in South Africa with a constitution that recognises same *** couples, LEGALLY AND MORALLY, and to be questioned in such a demeaning manor in front of other customers is very much unacceptable. I WANT AMENDS FOR THIS EMBARRASSMENT FROM YOUR BRAND AND FULL WRITTEN APOLOGY.