******* unauthorised debit orde

With them for almost 2yrs ,all the problems started with the extension of contact,they don't call you when you request at the time you are available,you can't call them cause them only have email and what's app.Now that are make ******* unauthorised debit for amount that I don't even have a subscription for ,and then are not even replying to the mail or what's app,you can even ask for a manager still no reply I'm so sick of the service I'm getting I want my refund but how do I get it the last time they debit me twice