Need a db specilist to config and check db

Hi there. Need a freelancer,, Seems like provider before this project controls my site I,cant reach it,, iwebsite is down! even if I created a new MySQL password and wrote the new one in at files ! a part is still function and is up! Even if I change MySQL password at all places This is a php site Please a hounest person! Need it fast my sie is down I will review your feedback this time