Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
That's an alarming problem, at least it must be alarming for you.
I need to ask for lots of details, so that I may understand what is involved in this situation:
1. what eBay app did you use to give feedback?
2. when did that eBay app appear, pop up, or otherwise display?
3. when you chose 'GMail', did you specify your GMail address at all? were you prompted to specify it?
4. Are you accessing all this - GMail, PayPal receipts, eBay app for feedback... on the same device? if so, what device is it?