My heart is bleeding.... SADV hmm.

I am very disappointed with their service. I am really fuming right now. I have been trying to cancel their service for almost 3 months now and it is still not happening. I have tried every way of communicating with them but all to nothing, the worse part is they are using Whatsapp only and they will make you wait for four to five hours before they respond to me. I have sent them a WhatsApp 13h13 today still now 16h55 still waiting. I have wrote them emails last month's still not responded. I have called Vumatel and they say they have nothing to do with the ISP, but I am surprised because at the end they said thy are contracted with the ISP not individual but they ate unable to help. If need help with payment thy are so quick to respond so that I can make payment, but now because is a deferent thing, they don't reply. Guys please please when ever you here the name SADV Internet provider ruuuuunnn and never look back or else your going to suffer, they will keep on coming to your bank even though you have sent them notice of cancelations months before, they don't care. I am really in pain, I don't know where to go anymore to get this resolved.