ZERO Support form Afrihost!!!!

Good ISP untill you need support. Since round about the 20th of January my connection-speed has dropped to less than 1Mbps on a 4G/LTE contract. It is 29th today and still no feedback to support me. They are deleting all the support-tickets that I have logged with their control-panel. (I have the email records). I am nearly 100% sure they are throttling my connection after 50% data-used for the month. (450GB left on the contract). Why would they? And if it was a fault from their side, just fix it, say sorry and carry on. Why don't they want to just admit to their problem? I have emailed the support personel daily, including Gian their MD, still no support. (I understand he probably got somebody screening all his emails). So all that is left to do, is to cancel the contract and move on to somebody that is honest in dealing with customers, and tell everybody else to stay away. (I also know they wouldn't care about losing a customer)