Rain denied double debits but my banker confirmed it’s their account

Rain debited my account twice in one month of March and I cancelled it because it kept glitching, they sent their courier to collect their router yet they debited again in April and when I called them I spoke to a consultant named Oscar who refused to give me his name and had a weird accent who since promised me their accounts department would call me but no one called up to this far. It’s been since March when I called for the first double debit but no one called me instead they continue to debit my account. I even had to change bank details just to escape them so please everyone be careful with giving this company your details because seemingly you can’t back out or their errors that affect ones finances can’t be corrected. It is sad that I send proof of payment and yet the consultant said it did not reflect on their side until I had to go to the bank only to be shown that it is the same account that has been debiting yet a month and weeks later the same account debits the same amount. Rain really sucks !!! I say everyone the sooner you find a reliable network the better.