Penalised for Loyalty

Webafrica has been my internet and ADSL service since 2006. I ordered a fibre connection on 18 June 2017 and it was eventually installed on 19 October 2017 with an installation fee of R1710 payable to the fibre company. I had to check something on the Webafrica website and found out that they currently have a special running where Webafrica pays the installation charge of R1710. When I enquired why this special was not extended to me and why I have to pay I was old that I ordered my fibe before the special started running so I do not qualify. Had I known this I could have cancelled my pre-order and immediately submitted another order and Webafrica would have paid for the installation. Nobody at Webafrica advised me in this regard when I confirmed the installation. Another way of looking at this is that I walk into a shop to purchase a product but because I pre-ordered I have to pay a higher price than the customer that walked in at the door and bought at the same time as I did but did not bother to pre-order. This is in fact a slap in my face and instead of rewarding my loyalty to Webafrica they choose to penalise me. I have called them several times and each time I insist that my query be escalated to management but I never get called back and each time that I call there has not been an escalation.