Quick to Sale , Sloth to Service Warning!

Thought you should know 18/08/2017 Walked into Vodashop Fourways - Wanted to down grade ,get my monthly bill lower. Was offered a new deal and promised a much less monthly bill. Signed payed and was only then told (at the till) they don't have stock of the router and walked out with one device missing as per my new contract.Went back twice as instructed and still another excuse.It is a month later ,i still have not received this device. Called the center, was told to send email to complaints, i received no response ,called again was told to send email to ceo , i got a response five days later -with inaccurate info and another excuse, sent another mail , i recieved no reply to this day. Still have not received the device.20/09/2017 Currently my bill is no different than what it was before i signed the new deal -it could even turn out be more expensive.? Disgusted at their abuse and disappointed at my level of naivety and trust! Worried about their retribution for this expose? My next move is to seek help from the CPA. Any advice?