I want my money back

I gave notice in July for cancellation of the fibre service in August. There's been no communication about the routers including the Openserv one but cancellation was confirmed. On 2 September they sent an SMS that the fibre router can only be disconnected by a technician. I responded immediately that I vacated the place and needed help with the next steps. No response. Also, Openserve did not install fibre.. only a router because there was fibre at the place and Webafrica knows this. I just saw they debited R1400 from my account.. even more than double the R520 monthly payments. I want my money back.