Rain are ****s they quick to deliver sim cards yet difficult to terminate

I've been trying to cancel one of my 5G simp card with Rain since May 2023,Rain has been taking me from pillar to post saying it will happen month end and up to date they've failed to do so, I was even assured that it'll happen so I decided to stop paying for the services that they couldn't terminate it's a nightmare because every time they promised me lie after lie and I've decided that I'm no longer interested in making business with them wrote emails made calls but still my cry has been ignored