Bad service from Universal healthcare

This is by far the worst medical aid ever when dealing with claims. There is money due to me they deposited the money into my account thats inactive. the account is been inactive since2019 meaning the funds bounced back to them. Instead of helping me they keep on sending me from pillar to post. This is money owed to me and they seem like they are refusing to pay it to me. I updated all my banking details sent it to them 3 weeks ago but when i call do do a follow up they tell me the bank havent sent the money back to them. I've never been so frustrated like this before in my life