Paid up loan debited again after 9 months

I had a personal loan with Capitec Bank that was settled in December 2016, to my surprise on the 29 September 2017 my bank account was debited with an amount of R251, . I disputed the debit order, then I received calls from Capitec saying that I have an outstanding balance of R1089.00. For the past 9 MONTHS I have not recieved a call or message notifying me of the outstanding balance.