There is no guarantee of hours at either job unless they stated part time at a fixed number of hours per week otherwise it is based upon needs of the store and volume of customers. The main issue is do you want to be a cashier which probably has some sales aspect but not primary of T Mobile...
The answer is no it is not illegal for a company to decline paying either vacation or sick time after you resign. In large well established companies the employee policy guidelines will state the company's policy on pay out of vacation or sick time, with a two (2) week notice. That is the...