Continuous Connectivity Issues

Wow just wow Vodacom SA. So a couple of weeks ago I wrote a review complaining about connection to the wifi home internet bundle that I have. I was then called and an 'investigation' was done and it was found that my wifi router which is 4G is not compatible with the area that I am in as I am in a 5G area. I was then informed that I needed to get a 5G router. When asking was informed that they cannot amend the contract I will either have to purchase a new contract or buy a router which costs almost R3k. Last week I took out a new contract as I could not struggle with connectivity. Well, well, well. guess what same issues experienced since yesterday with the new 5G router. Now my question is as a customer of vodacom what must or should I now do because the call center cant help me despite the fact that I now have a 5G router as per their recommendation and yet I am still struggling with connectivity. Can someone please make it make sense. Utterly frustrated and unhappy customer.