Bad Holosun Warranty Experience

Sent my optic in (Holosun 507 Comp green dot) for service in December due to speckles/dots appearing all over. Got it back yesterday and still has the same issue and isn’t fixed. Idk why they would send it back to me not fixed. Can’t believe I spent $400 on this just for it to not work and months not even being able to use it. I sent several emails yesterday about it still being dysfunctional/broken. Haven’t heard anything back yet from Holosun.