incorrect billing and poor network

Rain had erroneously debited me twice in March stating it was a system error and that they would refund me. This happend on the 7th of March , despite the many calls and emails sent to them, i have not received my money and the app is conviniently malfunctioning since that day as i want to remove my banking details and stop my services with them as the network has been very poor this month having to switch to alternative connections to connect to my meetings. I want my money and you can keep your poor network.