So Frustrated

So a few weeks ago payroll didn't my timesheet and rather than call me they just didn't pay me.  I had fax confirmation that they received it, so I got paid that day.

Last week I used PTO while sick.  My supervisor had told me to write some information on the form so they'd pay it.  I got my check.  They didn't pay me, so now I have a good bit less money than anticipated to live on for a week.

They also lost my timesheet again last week and I have to send it all over again, although thankfully this was caught  before payday.

What is up with that?