@udanil01, please wait for a response to your existing appeal. Ban appeals are currently not out priority so response times may be longer.
https://forum.multitheftauto.com/announcement/21-notice-response-times-update-may-6/
Perform a complete virus and malware scan, and ensure there is no software running that could potentially harm MTA or your own device.
https://forum.multitheftauto.com/topic/64715-install-anti-virus/
I have moved this into the client support section. Dialogue is not possible in the ban appeals section due to its settings.
Make sure that you're reinstalling OS with a legitimate copy. Cracked/pirated copies are not ideal
It means you have used a spoofer in the past. Perhaps to evade a ban for another game in the past. If you undo those changes, you should be good to go. Alternatively, reinstall your operating system.
You haven't been banned in a server or MTA during that timeframe, and it looks like the error you are getting is a connection issue so I have moved this into the client support section for you.
The ban for cheating is correct. If you feel you didn't use any cheats, it may be someone else who were in control of your device who used a cheat on MTA.