From good signal to bad signal and billing

I have got a signal problem in my area. When I took out the data contract years ago I had H signal now edge or even worse- nothing. I do have various contracts with vodacom, data(home use Internet and online gaming), tablet data and two voice contracts. My wife have a data contract with altech auto-page and all of the contracts are being effected. I did report it to vodacom and they got back to me by saying the network or tower is overloaded in my area and there is plans for a new tower but in the meantime there is nothing they can do. I do understand that but what is going to happen now because I am paying for something I can not use at all. Data that is accumulating each month and expiring.