Account debited for 2 months after settlement -cant get my refund

After my complaint on Hello Peter on the 7th of Feb were they charged my account R ( 534.54) for settling my account over 2 days. MBD got back to me that same say. I sent my settlement letter as proof to Abram on the 8th of Feb and he told me they will correct it. On 15/02/2018 I requested a paid up letter from him- no response on 24/02/2018 my account was debited with R 400 - sent Abram email stating this account is settled and why was there money deducted - no response on 27/02/2018 - I sent same email as Abram was on leave on 15/03/2018 Suzan rep**** saying they are awaiting my credit file from client which will indicate refund due to me End of March my account was debited again- R 134.54 - emailed Abram again on the 11/04/2018 - Still no response!! the amount that was deducted from my account was what they charged on my account for settling my account in 2 installment 2 days apart. Basically my first query was never sorted out.!