Wifi disconnected even after payment

Good morning. I enlisted the services of Home Connect through Vuma on in February. But on the 12th of July I canceled the order because they did not show up to Connect my WiFi and I had used another ISP and they said in order for them to go through with it I had to cancel the previous one so I did that u sent them POP and everything. Much to my surprise Afrihost has shut down my WiFi and they are asking for proof of cancelation. I am so angry and confused. It's nearing the end of August I have not been refunded my money and my WiFi has been disconnected. Please assist,this is yet another that ISP don't give a damn about their customers.