I am a caregiver. My client didn't have anybody to help her when I was out sick. My company never made up for the hours to my client.

If she paid for coverage and had none she should be credited those hours.

Did you speak with your company?
Did you ask them what the misunderstanding is here?
What did they say?

Tell us about this client: does she have cognitive or memory problems? If so, and she is dealing with your agency directly (because you said she "didn't have anybody to help her"), then this may be one reason her care fell through the cracks -- because she didn't request a sub to cover when you were gone. You should report this to the agency if you have a reasonable concern about her ability to care for herself so that they can report her to APS. It's not the agency's job (or even your job) to manage her affairs or make decisions for her. But you may be considered a "mandated reporter" by your state, so please find this out. "I think my company doesn't provide all the hours that they get paid for by contracts ." This seems like a separate issue and you need to have actual proof, you cannot go by a feeling or opinion. There needs to be facts.

Sadly this is the norm. My coworker used agency caregivers and often was left without anyone for her mother. And with very little notice.