OP lost $600 to a scammer. Then contacted another scammer who promised to help recover his money from the scammers for a upfront payment of $300. In total OP has lost $900.
The OP clearly states that he lost $6000 and another $300 as a result of trying to regain what it lost - which totals $6300. It’s not some complicated math, you just need to pay attention to the details

Thanks for the correction. I missed that one zero. OP has lost a huge amount of money $6300 is not chicken change no surprise he wants his money back at all cost.