Old mutual dispute

I withdrew money from my old mutual card at a standard bank atm in July, I only got 150 out of 400. I called standard bank 1st and they said I should call my bank which I did. I was then told to go to the branch which I also did same day. At Acornhoek old mutual they gave me dispute forms to fill and submit and I was told to wait 30 days ...which I did.After 2months there was no communication and I had to go to my closest old mutual which was at midrand. They called their head office I think, and then I was told to wait 14days which I did. But nothing happened ..i went again and i was i told i would get a call within 10 days and still nothing...i went today the 18th November they said they are offline... For 5 months now I still haven't received my money nor feedbaak. I am so disappointed with old mutual and lost trust in them