END OF CONTRACT

MY CONTRACT WAS CANCELLED ON APRIL BUT THEY STILL DEDUCTING ON MY ACCOUNT AND AT THE END OF THE MONTH THEY WILL RECHARGE MY ACCOUNT WITH AIRTIME AND DATA AND WHEN I CALLED THEIR CALL CENTER THEY TELL ME IT HAS BEEN CANCELLED BEFORE I WAS PAYING 189 FOR MY CONTRACT NOW IT 159 TO SEE THAT THERE IS SOMETHING WRONG I DON'T KNOW ANYMORE I WANT OUT OF THIS CONTRACT THEIR CUSTOMER CARE CAN'T HELP ME PLEASE HELP