I was asked to verify a global payment!

Hello, I have been receiving funds via the global payments for months now. On the 11th of October a payment of $300 was made to me by a client and I was asked to verify the payment by answering some questions.

I have answered those question and am still waiting on my funds.

I have sent mails to support and is yet to get any feedback from them on my funds.

It's past 20days now.

How long is this suppose to take?