Vodacom's service is non existence and the Tower problem is getting worse

We have constant problems with our Vodacom Tower and have very regularly no signal no internet or are able to phone. Last week we had no internet again I had to walk out of the house into the garden to get a little signal to phone Vodacom support, the calls were disconnected 6 times,, as a result of the poor signal. Today we did not have internet again I phoned vodacom and got a message "unusually high calls from my number" and blocked my number. We do not have internet but I can't phone either. I borrowed my daughter's phone, and the consultant was incredibly rude and told me that he is not able to unblock my number. This is not acceptable. I have been a customer for at least 26 years, I need to uprade my contract but I should rather change to another network