Shocking internet

I have fixed Wi-Fi for my daughter who is at university in Cape Town. This product has worked really well, until this year. Now the internet keeps dropping, speed is very slow etc. I have contacted Afrihost on numerous occasions, and have even been told to contact Rain. Considering I pay Afrihost, I don't see why I need to talk to Rain. I sent the CEO an e-mail over 3 weeks ago, and despite an auto reply saying he will get back to me, I have yet to receive a response. In our last conversation with Afrihost, we were told to possibly look at Telkom and MTN. As my daughter finishes university at the end of the year, there is no point in looking at alternative service providers, I would just like to you provide the same level of service you have done in the past and what I am paying for.