I tried that says user name and password is wrong

After factory reset I can't sign in even with super and sp-admin

I don't know how

What's a OEM company uid/pw

I have tried talking to supervisors there and was supposed to have a ticket assigned to me so we can fix this we have about 50 of your units and was gonna buy about 100 more but the owner of the hotel wants to not use your company any longer due to y...