Terrible Sales process

I have app**** for a 100/100 fibre line following a promotion that vodacom had which would be R699 per month. When I received the quotation, I was surprised to learnt that the actual amount would be R908. I subsequently asked them to rather install a 50/50 fibre line instead which would cost me R709. The process of changing my application to the 50/50 line request has been a rather frustrating one. The sales people I am dealing with seem to either not want to perform the request or are just ***********.

The sales people's names are Sigubu Tshifhiwa, Vodacom (External) <***> and Sthembiso Mahlaba, Vodacom (External) <***>