DAE know a promo or discount code for APPLE or BEST BUY?

I tried purchasing a 13in Macbook Air since I had started nursing school and I got declined with the financing option at Apple due to me being only 20 and with new credit and at Best Buy they gave me a leasing option and one of the employees had brought the laptop out so I could pay for the taxes and take it home. Until he realized I was only approved for $550 and said I couldn't lease it unless I paid in full and I definitely do not have $900 to drop on the spot so I had to leave which was quite embarrassing for me. Trying to see if I can get someone to help me pay after using a promo or discount code. Thank you so much.