[jefff]

OFM is simply a death sentence for your account. They know what's going on and they will not refund you until you send the item back. You must write directly to the OFM department to request a new return label, just write that you already found this PC and your neighbors picked it up or something.

Thanks mate, I would totally do that but I am worried that they will refuse my refund, as they close my account due to the reason of too many refund.

Should I try with charge back with my bank first, as after I have told them I have found it, I cannot charge back anymore

No worries. They can't refuse you a refund if less than 30 days have passed since you received the item, these are the consumer rights on their site. I know what I'm talking about because I had the same situation with OFM. Just mail them and ask for a new return label, they have to send it to you. If you make it in time and send it up to and including the 30th day, they have to refund you. No charge back needed here.