Scam or not? What should I do? 😔

The event is almost over and I don't know if I'm getting scammed 😔

Note: I'm not blameless as I didn't see the pictures with specific card requests. And I sent the second card without getting the exchange request sent first. Sigh.

Summary:

User posted request for 2 4 Stars or 1 5 Star for the GB Petal Party. I mistakenly thought it was any 2 4 stars and did not see pictures with specific card requests.

Anyway, I indicated I can do this and gave my MGO link and IGN name. Person responded and also gave their IGN name. I responded to send me a request and I will send both cards. Not waiting for their response, I logged into the app and saw they added me. So, thinking to make it easier for them, I sent the 4 star and the second one as a request.

I went back to the post and saw they posted asking what I can offer at the same time as my other response. So, I responded that I sent both cards with 2nd as exchange request.

They didn't respond immediately so I posted indicating I was waiting for them. No response still - so decided to wait as maybe they got preoccupied with something else.

4 hours later, no response still so I posted and indicated if they didn't want to trade anymore to just give back my 4 star. No response. Waited more.

I decided to check their profile and saw they were online and have re-posted same request and doing other trades. I sent another message asking for it back and still no response.

What should I do? 😔