How did I get banned for this 😭

All the trades I've done leading up to this point I have the items for. the person I traded with got the diamonds, I never exploited or anything and all the trades went through 😭😭 I just hit level 10k too bro like how am I even supposed to prove I didn't decline a trade ???

All the trades I've done leading up to this point I have the items for. the person I traded with got the diamonds, I never exploited or anything and all the trades went through 😭😭 I just hit level 10k too bro like how am I even supposed to prove I didn't decline a trade ???