@Md Jabed Hossain before expiry of contract( qiwa contract) , you submit " DO NOT WISH TO RENEW CONTRACT" in qiwa. and get new employer qiwa request get accepted, after 90 days even present employer not accept also will be transfer to new employer.
If you have car in your name present employer cant give final exit.
better not to fight with present employer, as friendly get the transfer.
also if this not work, get a new visa from open market and come back