Worst service

My previous company has put in a withdrawal claim for my Provident funds on behalf of me back in September and I have only recently started to do follow up calls for the withdrawal and each time the operator keeps on saying it has been escalated and the person will call me back, but I'm yet to receive any phone calls, earlier today I call the operator said the same thing they will escalate it and when I called the administrator that's dealing with my claim is now out of office, it's been almost 3 months and nothing has been resolved.