MTN SUCKS Bigtime. Worst service ever.

I have a data contract with MTN, and in the beginning it worked reasonably well. Nowadays however it is slow to nonexistant, with numerous errors and Non connection to the internet. my contract end September, and I am seriously looking at another service provider. Also if service does not improve, I am thinking of ending my contract now, seeing as MTN does not honour their part of the contract in providing me with a reliable internet connection.