Accounts on the forum don’t get deleted. You could either choose to be inactive on it or request for tags based on some reasons to protect your reputation. Both usernames Advertorous and Minorjones are none existent on the forum.

If it was MinerJones to whom your where referring , the user is an active contributor on the collectible section of the forum and given his contributions to the forum, I don’t think he would want to risk his reputation that way. You could still reach out to him on the forum and let’s see how it goes.
Telegram has never been the best place to conduct business. Forum would have been better and have them quoted and tags to mark the activities.