^^^

None of this suggests you didn't scam your customer. You said you were going to refund him. You lied. You are a scammer. Nothing else is pertinent to this matter.

I doubt you have any potential customers left at this point, but if you did, they would be wise to avoid you knowing this is what could happen to them should you take their money and they complain about your lack of progress afterward. You are telling them this could happen to them: you promise to refund them, don't, cut off communication with them, and then threaten to sue them when they complain about it online.