Help to resolve issue in Arduino robot programming of Mecanum wheel robot using PS2

I have a 4 mecanum wheel robot chasis bought from here https://www.ebay.com/itm/353421554834?hash=item524990f492:g:OqkAAOSwqHNgUGaW&amdata=enc%3AAQAHAAAA4K2Vd0oSs6Oq3C0Pb8UTJ%2BPYvyskf1Du4bKsrh%2FRX%2B5nVrkaOQ3OQ%2Fa9S37OtjZjOn65IA9zsyD7GmaoTbOgp1%2F23kaDn2YrgghdiAj2Gz%2Bgqw%2FwjsDIqjpuO%2FsQrQkQXCFUM%2FytyTL0EveE6PNumRftI9PjWjE%2Fl4m6w%2BTZjZs6gtTx77a3Y%2F2uZl3ZZLrc%2Fs48dApEyCaWcyFgmYJ8DY4fS8rAdcB8JyI97oMVE%2Flt7NbrL2mtCv8D7CG7DD2ThBYolcQ3tD%2FynaYEWzP2KfEiNFW0TmVv8FXNRa%2BuYvPR%7Ctkp%3ABFBMtOCjpsdg. They had provided the source code but somehow its not working out of the box. Some issue in PS2 controller part needs to be debugged. I can remotely show the issue and would like assistance who has already worked on PS2 and macenum robot of a similar type. Please mention your previous experience when bidding as I will only reply to one who has firm knowledge about this.
Before replying also go through this rep https://github.com/MoebiusTech/MecanumRobot-Arduino-Uno