What do I do if there is a problem with my COMC Auctions purchase? COMC Support September 01, 2020 12:22 Updated Please contact firstname.lastname@example.org if you experience any issues with your purchase. Related articles How much does shipping cost? Can I combine shipping? If I win an item on eBay, can I have it transferred to my COMC account instead of having it shipped? Can I return or exchange an item I purchased through auction? I just bid on an item. Can I cancel my bid? When is payment due for an item I win at auction? Comments 0 comments Article is closed for comments.