Looks like i just lost 140 due to overloaded network.
Nonsense. You "lost" 140 due to not knowing what you are doing, and sending a transaction that you now don't want sent.
I think I will use another coin like monero soon.
Good luck with that.
As bitcoin Is non economical at all
Non-economical? The smaller the amount you want to send, the less economical it becomes. For anything more than a few Euros worth, I've found it to be plenty economical.