account suspended even after paying-Shortfall which was not debited.

They debited my account for the medical aid, only R3334 instead of the R3750 agreed upon, when i was approved for medical aid, a week later receive a msg that my account is temporarily suspended need due to a balance of R373, why was this not debited on the same time the other debit went through, I called for assistance and i was transferred to finance no one picked up, i cannot access my benefits regardless of paying. a mistake Discovery made