Discovery unauthorized debit order and fees money

I canceled my temporary credit card in February and yet still they are deducting money from my account and still taking fees from my account and I'd enquired one of their consultants about this and they'd said it'd be attended too in March and still Discovery is still deducting. I am not happy about this at all why should I be paying fees for a service I do not want from you guys. This is totally unacceptable and I am very dissapointed in your services