WEBAFRICA IS USELESS AND CUSTOMER SERVICE SUCKS

I have been trying to cancel my services with webafrica but they keep ignoring my request. Yesterday, I received an sms saying that my service has been disconnected. when I enquired amount the billing as i made a payment on the 25th of Oct. they charged me R19 through payfast on the email that they have sent to me. on the 23 of September i also paid R399. now i was told that the R19 is for the invoice generated. i never requested for an invoice. i also have R91.00 been charged on my account that I know nothing about and i enquire they still don't give me a detailed explaination. The whatsapp number provided is useless as they take forever to respond if ever they will respond. I want to cancel their services so that i can look for a reputable ISP