Poor customer service

I've updated my payment date but was debited on the old date scheduled regardless of the arrangement made.I then payed the outstanding bill and requested for cancelation of service immediately. I was told that cancelation has 1 month notice where I will continue with my account then pay the last usage bill and my account will be deactivated. My simcard was never reactivated and I've stayed q month without connectivity but was billed for data which I had no access to.