You don't have valid and needed information here, so I don't think anyone could provide the needful answers as you seem to be ranting. You don't have access to the transaction details, not the email, not even the computer you used at that time. What else could be provided to you? Also, what did you mean by "x 100000000000000000?" Bitcoin amount or what? Maybe you should reconstruct this question for better clarity.
However, on the second question, I found something that might be useful to you here
Mt. Gox Cryptos have not been recovered till now, but there is hope for that soon.
The number OP mentioned is nothing but multiplying his commotion of how retarded they were back then not to save the information properly and now regret it after decade of time.
I am not surprised because anyone would feel the same way as OP is doing.
There is literally no way to recover your bitcoins because OP does not even have relevant information about the storage, neither the keys and nor the trail of the whole communication.
There is no use of contacting the person to whom you sent them because what you gonna say to them? Return the coins?
