I am VERY UNHAPPY WITH VODACOM

I am VERY UNHAPPY WITH the level of service at VODACOM and to think I was considering becoming a customer. It is very disappointing that VODACOM makes people take up contracts with them knowing that they do not have enough stock ,I went to VODACOM The Glen on BLACKFRIDAY 2017/11/24 and I took up a contract which was on the black Friday promotion for a p9lite plus a p10lite for R250.00 for which I was approved and and told to come in the following week on Wednesday to collect the phones because they were out of stock however to my surprise when got there l was told that they have cancelled the contract because this offer was valid for black Friday only ,Why did they still do the contract knowing that I was not going to get the phone I could have gone to other service provider but no they just had to give me false hope and know I am struck with no favourable option had they at least called me or me the same would have made provision to get a black friday else where the most upsetting part is they waited for me to come in store instead of contacting me