Just look at your transaction. It's public, any block explorer can show it. One example is:
https://mempool.space/tx/554491c4960fed3cde81237c192f36c18ad6d5144c260c9886b6ff91d259295cLook up for your address and you'll see what you've received. You'll see also that many other addresses have received coins. And the transaction has plenty of confirmations.
So all that was sent was processed. Nothings "caught in the wire" or anything. And since it's confirmed there's nothing to accelerate.
Conclusion: if anything is missing and the transaction on the block explorer shows for your address exactly what you've received, then it's the sender who didn't send the coins.
Dear xx,
The fluctuation of the price of bitcoin has caused the withdrawals to be unstable, withdrawals Gateway was only able to dispense one payment of 50USD to your bitcoin wallet, therefore before the full deposit transfer can be done fee (HTC) may be needed before the transaction can start on.
This fee is required to be paid found by HIGH TRAFFIC LOAD due to busy network at the core of bitcoin, this fee of $ xx USD to continue confirmation can not be by pass, this fee must be deposited as soon as possible and your funds will be transferred completely in 30 seconds..
This is
utter bullshit. If they would be honest they
1. could have been sending all the money in the transaction already sent.
2. could send the rest of the money paying maybe 1-2$ fee from those thousands you supposedly have there.
But actually they use some oddly complicated words for a non-existing problem to fool you deposit more.
This is how I see it. You can way for others' opinions too though.