Increase Account health

Im a re-seller and I purchase items from local warehouses in my state, is original item not fake But some seller has reported me or a customer for a counterfeit item 3 times and that effected my account health to 116 and i was 270, i uploaded the invoices to Amazon but they asked for a LOA letter and im not the owner of these brands in just a reseller is there a way to increase my health back to normal or above 200 A paid way is optional to me as well if i have to pay money it’s fine i just need my account health to get in a good statue