Bad experience with MRP Mobile

MRP Mobile worst decision ever took a contract with them in 2019. After 3 months i lost the phone tried to do sim swap i don't know how many times i tried calling them with no help. I then gave up continue paying a monthly premiums coz we had a contract up until i finished paying for it in July this year. Then last month they deducted money in my account, i had to reverse it and call them and ask why? they told me i owe them for not cancelling i didn't follow the procedure