Signed Message has indeed verified.
Screenshots of PM's were also provided and confirms dream4's claim.
1. Send mr.bitcoinerf11 a PM, ask for the agreed upon repayment. If user still fails to communicate with you then
2. Go to Scam Accusation section, create a thread there. Use the format:
Scammers Profile Link:
Reference Link:
Amount Scammed:
Payment Method:
Proof of Payment:
PM/Chat Logs:
Additional Notes:
3. The amount doesn't matter. Please do this so the scammer would be tagged appropriately by DT members. It would help warn others and hopefully, avoid any future scams.
*As suggested, send mammabitcoin2u a PM.