You were fobbed off at customer services or served by someone who was new on there. Cos under our desk we have a box of application forms, which on an average saturday, i give out about 4 or 5 and I answer any questions regarding them. If u go into the store on a different day and ask, they should give u form, if they don't, ask to speak to a member of personnel.
Firstly, u don't need a CV, just an application form (which you should have received). If u give in a CV alone they will ask u to complete an application form. If you get an interview, look presentable but not over the top, also be very confident even if your not, I did and got a job and I've been giving more responsibility after only 4 months. Also make it seem as though you would do everything you can for customers, especially if u do the cheese role play. Good Luck in finding a job.