Rain Internet Service Provider not cancelling the debit order on my credit card

I signed up for the Rain Internet service in April 2020. Since inception the service has not worked correctly at my home. I've tried contacting them on a number of emails as their customer support can only be contacted via email. After the month of April I decided to have them cancel the service as the network connection was always poor and when it was OK it couldn't even load basic Web pages. Thus far I've been billed 2ce in April, then 1ce in May, then 1ce again in June and yesterday on the 1st of July again despite asking rain support to cancel the service and refund money for the time the sim was not in use. I've tried removing my credit card info from their billing system but was unable to. I've sent numerous follow up emails to have my money returned but not 1 person has assisted me as yet.

I would strongly advise against signing up for any services from this company