I need assistance to get overstay fine waiver or...

You can file a grievance with the General Administration of Residency and Foreigners Affairs to agree to exempt you from the fine or part of it and to pay it in installments, knowing that:
The Federal Authority for Identity and Citizenship announced the extension of the exemption for "violators of the Law on Entry and Residence of Foreigners for a further period of three months and exempting them from all fines, provided that the extension starts from 8/8/2020 to 11/17/2020 when the violation occurred before 1/3/2020 and it includes exemption from all fines imposed on them, provided they leave the country.