Debited Twice for the service I did use.

In December 2021 I reported that I did have network several occasions with no help and I told them if they can not resolve the problem then they have to cancel my sim card cause I can not buy mobile data and still debit my account. I last used the sim card in December after complaining to them about the network. Today I was debited twice for the service I did not use. I want my money to my account please.