Sorry, please wait another 30 days, we cant assist

I was contacted early January, as I have an unclaimed benefit. I called the number and received all the documentation that I needed to complete. I was called 3 times after that requesting that the documents please be completed urgently and sent through. I completed and sent through all requested documentation by the 17th of Jan. I was informed that I would receive payment roughly middle of February. I did a follow on up on Thursday, I was then told then documentation was not received and I would need to wait another 30 Days before payment can be made. Now I really cannot understand how it is possible that I receive no help, not even we will try and understand what could of happened, or we will try and see how we can assist you, I was so rudely told, that I would just have to wait another 30days. The service is ridiculous, but when they called every so often to get the documents from me, then I had to respond with a sense of urgency. The service sucks. Another 30 days is a joke. Utterly terrible service.