check this image
https://i.imgur.com/CKogIJ1.pngits for when he dont block me and the last recently time and image are ok
but in telegram when u use ban you
you dont see the use profile image and also the last seen will be change to "last seen long time a go"
He doesn't have any profile picture in Telegram though (and I'm not blocked).
Try to add him through this link:
https://t.me/AmazonBalanceIf you can send messages just fine to that account, then you've added an impersonator.
It's worth mentioning that I don't know Podgor personally. I've just dealt with him several times.