StubHUB ! Scared to death!

AXS or venue Changed my tickets

I sold my tickets to London Wembley for August via stub hub. I am waiting for the transfer to open in a couple days to transfer. I just got an email saying that the venue changed tickets for me and others and they gave me similar tickets. The tickets are two sections over arguably a better section but 10 rows further back than my original. Does the buyer have to go ahead with the purchase? I hope so. If I would have been able to transfer he would be in the same boat plus the tickets are very similar. I have heard terrible stories about stub hub and worst scenario would be they charge me the whole sale price as I can’t deliver the exact tickets I listed (and had until today) when venue changed them. What do I do?!?