Dirt cannot be removed. Can it be repaired by you?

Dirt cannot be removed. Can it be repaired by you?

I bought an outwear (H2no) about 10 years ago. It’s still in an excellent condition. However, some dirts in black appeared on the zipper that could not be washed out or removed, and the seamsealed fabric was off inside the sleeve pocket. Just wonder if it can be sent to you for changing a new one?