Old mutual omp

I paid money into their nedbank omp account and used my ID number instead of policy number to my surprise the money was not allocated to my policies,ask money account team to reverse the money they refused,asked omp to assist till today they said they will call me back,I have been overcharged every month by omp,if my policy is R20 they deduct R30 instead and I have complained numerous times about this.they **** people and never admit their mistakes.old mutual OMP I want my money or allocate it towards my policies,they claim they can see the transaction but don't know how to help me,who must assist if not them because it's their financial institution