Webafrica is the worst!!!

On 25th July I sent through my cancelation request with webafrica via the whatsapp number due to moving houses. They had debited my account for July. 1 August they debit again. 8 August I whatsapp'd them again to find out if the cancelation request has gone through. They said no. I asked them to again cancel it and where to hand in my router. I then handed in my router. End of August they debited my account again. 28 August I got hold of them again and asked why my account hasn't be canceled. Sent them the proof that my account has been debited, proof that I've sent through my cancelation and proof that I've handed in my router. I was told I must wait a month and that only now they would send through the cancelation request. 26 September my account was debited again! I again got hold of them. Again explained everything and asked for the manager to call me. The manager didn't. 12 October I got hold of them again. Sent through all the chats, explained everything again and again requested the Manger to call me. Still hasn't called. I contacted them again today. Got put through to 5 different people, explained everything 5 times only to be told I need to wait another month and they will put through the cancelation. I asked for the mangers direct number. No the manager can only call me back. Still no call back. I asked to have this resolved today! I got told no it won't be resolved today.. So for 4 months I've been paying for something I'm not using. ( I went to cancel debit order at my bank, but somehow they still manage to debit) They keep telling me to wait a month but never cancel. The manager can't call me back. My router has been handed in. What do I do??????