<human>: I worked for a non-profit/non-public school as an at-will employee for over a year. Within that year I was paid $14.95(probation period), to $17.50(standard pay), to a bi-weekly salary of $1,440.

Many things lead to my resignation, but the final strike was:

A reduction of pay of pay from a bi-weekly salary to an hourly rate of 14.95 per hour, plus a three month probation. 

This was offered to me through contract on May 6th, but was dated for April 29th. The pay deduction was to be back dated to May 1st, the beginning of the new pay period. 

I refused to sign the contract and put in my two weeks notice. My last day was to May 20th. 

Here is where I am running into problems- 
I still have not received my final paycheck.
I made a mistake by not entering in my hours (which I never did when I was paid salary) 
However, they process payroll on the 15th & I want to know what  I can do since I gave them two weeks notice and why they didn't tell me before hand that they could not process my payroll.

I have since submitted my hours and my payroll department told me that Wells Fargo probably won't get my check to them until Wednesday. 

If anyone could give me some advice as to what my options are since I know I did make a mistake with entering my hours. Also, I want to know what to do since they plan on paying me 14.95 per hour even though I was not aware of the pay decrease almost one week after and I did not sign the contract agreeing to the new terms of employment.

Summarize the given text in a few sentences.
<bot>: Nonprofit decreased my wages w/o my knowledge until a week after. Final paycheck has not been given to me yet.