Absolutely PATHETIC service - stay away from this company

I cancelled my service on 9 March 2021; the calendar month's notice started 1 April to 30 April. On 1 May, the service was stopped BUT I received an invoice for May. I queried this and was told that my service would only be cancelled on 30 May. I rep**** that I had received an email confirmation that the service would be discontinued on 1 May, which the agent confirmed and said I need to send an email to ***. I asked if this was the correct email addres and shouldn't it read "complaints"? No response. And it's superflous to send a mail as this service has been stopped and one can only make contact with WAfrica through the WApp service. My service was cancelled well in advance, the service was stopped but the billing continues! The debit order has gone through for this month. I need a full refund ASAP please as well as interest and a refund for all the trouble I've had with this service.