No, it will show up as one new loan but the old tradelines will remain, with the late. I'm sorry. If it is just a 30 day late, your account will recover before the 7 years of up. Just give it some time.
You could also call in a few more times asking for the retroactive forbearance. Idk who your servicer is, but imo they're all horrible & known to give different answers at different times. Maybe you can get to a specialist who can at least tell you why if it's really a no.
