I am a Bangladeshi and I have an account in QNB...

We would like to inform you that banks in Qatar grant personal loans, but they must be in a company known to the bank

If the company you work for is not known to the bank, the banks do not grant loans, unfortunately.

I advise you to contact the financial department of your company to ask about the banks that have contracted with the company or approved by the company to transfer your salary to them and try to obtain a loan through them.