Without the proper information we can't help you.
Needed are:
1 Username
2 Link to add
3 Add number
4 Pictures of your claim
5 Name and address and telephone number of seller
6 Copy and paste any private messages you two had
7 Then we can contact him and get him to come here and hear his side of the deal
More info we might be able to help you
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There Is 1 Thing Better Than Cubic Inches,,,More Of Them