1. Wait for auto cancelation of visa after 3 or 6 month period
2. Your 1st company needs to deposit return ticket at QA and apply for cancelation; they can get the refund back but cancelation charges will apply
3. Come on 1st company visa; pay them QR 300+ for the visa charges and ask them for a NOC
4. Just come on 1st company visa and exit on the other day; Make sure they will give you EXIT (this way company can save their visa+ issued visa will be cancelled after your exit .
5. As soon you exit Qatar your 2nd company can apply for fresh visa
You have 4 options to go with
1. Wait for auto cancelation of visa after 3 or 6 month period
2. Your 1st company needs to deposit return ticket at QA and apply for cancelation; they can get the refund back but cancelation charges will apply
3. Come on 1st company visa; pay them QR 300+ for the visa charges and ask them for a NOC
4. Just come on 1st company visa and exit on the other day; Make sure they will give you EXIT (this way company can save their visa+ issued visa will be cancelled after your exit .
5. As soon you exit Qatar your 2nd company can apply for fresh visa
Hope this answers your query;