False adverti*****t "of full coverage"

At the end of February 2025 I went to Vodacom and MTN looking to take out wifi. I then seen the deal Telkom offered, and then took the deal out with them, being told if it doesn't work for you we will refund you, but don't worry there is coverage in your area you won't have a problem. I have been back to the shop after thtasta complained that it was not working. The manager then said to me go and try this router if, it doesn't work we will then refund. All I wanted was wifi so I could use my phone and watch movies but to no avail was this happening. I returned everything to the shop at trade route mall and the manager asked me to state on email what I experienced. I done that and sent it on to him, to date nothing has been done. I am now at a stage where I'm ready to explode, for the lack of communication, service and support.