Rain wifi service

I've been their customer since 2019 with some hiccups here and there but now their service is getting badddd, when you don't honor your payment they suspend their service but when you have a challenge they can't help.I paid twice in Nov and I've been trying to sort it out since without any breakthrough even after sending all relevant proof but now they're trying to debit my account...I'm not paying for January coz I've already paid twice in Nov meaning it's for December and January.