False advertising

Hi, I recently ordered a birthday cake from Milky Lane. When I opened the cake at home I was horrified. The cake looks absolutely nothing like the cake advertised on Milky Lane's website. I even showed them the photo on their website on ordering the cake. It looks like they took a fork and sc****d it all over and around the cake, which is nothing like the smooth, blended in, cake that they advertise. On the cake I can see where somebody put their finger into the cake also. The colours on the website is for a Galaxy theme and the colours look nice and bright with blue and purple blended together, so I went and bought decor for my sons birthday with galaxy theme blue decor and balloons...the cake I received did not even have blue in it at all, it was mint green and the bright purple was an awful pinkish colour. nothing like what they advertise. The guests was already at the party and I phoned the CRESTA branch where I got the cake from. The female manager was so rude and not helpful AT ALL. Instead she told me that there is nothing wrong with my cake and that it was the cake I ordered. Can you believe she actually wanted me to get in my car and leave all the kids alone and take back the cake? Which means from having that awful cake I will have the NO cake at all. She simply did not care and insisted its my fault because I wanted to have white instead of pienk on the cake... how does that make a difference now for them to change also the blue to green and also change the purple to pienk??? I want a refund or should I sue them for false advertising? The manager wants to give us 2 waffles to make up for ruining my sons birthday party. So should I leave my 3 kids at home again and go with my husband and eat the 2 waffles at the same branch that insulted me and was so rude to me? I will never go there again and I will not leave this matter here and stay quiet.