Stop taking my money!

I don't understand what the meaning of "Settlement letter" is to this company. I settled an account that was handed over to them and finished paying it. I got rhe payed up lettee but my account is still getting debited for an extra 3 months! I am incurring charges having to reverse these payments and honestly, it's a nuisance to deal with. I read a review about this before I started making payments with them, to see that they are still settling for this mediocrity is beyond me! STOP TAKING MY MONEY!!!!