Poor Vodacom Customer Service

I recently renewed my contract with Vodacom and took the Samsung S6 edge and after a month I stopped picking up 4g or normal signal for calls or sms's to go through. I took the phone into Vodaworld in Midrand where the consultant did a system update. This failed to resolve the issue. I then took the phone back and was told that the phone needs to go in for repairs. I requested that the phone be replace as it is only a month old but was told that it states on the contract that phone more than 7 days old will have to go in for repairs and if the problem is not resolved then the phone will be replaced. I got to collect my phone and after waiting 1 hour to get to a consultant i then had to wait a further 30 mins for them to locate my phone. After turning on my phone I found that i had the same issue of no 4g signal and poo signal. The consultant then says they probably did a system update and never tested the device and said that the phone needs to go back in for repairs. I find this totally unacceptable as it seems Vodacom does not believe in customer satisfaction. Aqeel Hassan