Grand Theft Auto: Liberty City Stories (PSP)

The game was expected by the 7th of April and arrived very late on the 11th. I let that slide due to the current situation.When it came to finally playing the game, the UMD disc casing was all cracked and scratched but I replaced this with a new case. The game on several attempts would not load and would come up with a message saying "error reading the grand theft auto UMD". The disc on close inspection had this weird smudge that I can't get rid of which I think is part of the problem.Overall I am disappointed and would either like a refund or replacement.