Very Poor Service

I have app**** for provident fund in July and have been following up on my claim with no luck. First I followed up with the call center *** and was told my banking details changed so I must do affidavit after submitting my first affidavit it went quiet until I followed up again with them then was told the affidavit is wrong, I need to write my account numbers showing I changed from this bank to that bank, they called me last Friday 16th October - I missed the call as I am using my sisters phone so was not around. I then called them back on Saturday 17th October - was told the lady who works on my claim is not there, I called on Monday 20 October and am told they need to prepare my file before they give me a call - I am getting one story after the other from the call center ladies, the lady I spoke to today refused to give me her surname and refused to transfer me to the manager saying am I trying to say she is lying. This is really frustrating and I am sitting here waiting for a call the whole day which I could be going out looking for a job and doing my other personal errands. Why do they need to confirm my details again if they have asked me for an affidavit that confirms my details and why does it take 3 months to sort out my provident fund claim? I would like them to contact me today and sort out my claim.