Scam help

My dad recently “invested” with these guys over the phone, he’s invested 3.3k aud and i have 0 clue the process they went through, apparently its grown 300% which is the most obvious scam and despite me telling him to not to do it hes done it anyways. He has 0 clue how to even use his phone and I’m not familiar at all with crypto, but theyve sent him some kind of balance in a onchain crypto app, this is also sus to me as they were attempting to get him to deposit eth into their acc to claim which i did manage to talk him down from doing. The balance says 8k USD although the 0$ sign underneath makes me think otherwise and theyve just named the token or currency to USD to trick him. It’s an ERC20 token and I’m wondering if its possible to try and claim it in hopes it isnt actually fake, i connected the onchain to a new crypto.com acc but its asking for eth as a network fee. Should i even bother trying or just give up completely and tell him to contact his bank to get that 3.3k back?