I'm cancelled last July 8 . And my ticket schedule...

I'm cancelled last July 8 . And my ticket schedule on augost 7 but travel egency send me message that my flieght on augost 7 of Cathy airlines is cancelled and they book me again on augost 18,2020.my questions sir, that I don't have any fines .or it will wave? I don't have any money sir about this matter.plz help me what to do.thank you