Reverse the money that you’ve debited twice

I have retirement annuity with Old Mutual which I took out in 2012 and I was paying it through persal and have never skipped a payment since.In October 2019 I decided to pay that premium through my bank account, I submitted all the documents that they’ve requested at Modimolle branch.The very same October they had debited my account and deducted money from persal, meaning I paid twice. Then I visited Modimolle branch to enquire why I was debited twice,I was told that after 3 months the money will be paid back. Come December I went to enquire again why I was not paid back as promised, I was told to leave and come back in January 2020 as most of the staff had went on leave, January 2020 I was debited twice as well, I went back to follow up today .... and I was told I owed the first two months when I took out the retirement annuity in 2012, why the hell wait for 8 years before I could be told that I am behind with premiums.... can this matter be resolved as I am tired and annoyed of visiting Modimolle branch every now and then as if I work there.i do not have money to throw around like that, can always transfer my retirement annuity elsewhere