Poditrist visit

Well I went to the poditrist today, I don't have heel spurs but what i do have is a worn-out ligament that connects from the heel and goes across the arch to protect your arch and keep it from being flat on the ground or something like that. anyways, He wrapped my foot in Sports tape told me to leave it on for like 3 days, gave me a prescription of Naprosyn EC 375 MG.
When I went to Walmart to fill the prescription I waited for 30 mintues and when i got to pay they said they didn't have enough so they gave me 3 days worth and told me to come back! WTF! i'm going to be out of town (if things go right) so that means i'm going to be without medication when i run out! Why couldn't they of gave me the option to take my prescription Elsewhere like across the street at Eckerd's or something. Walmart pharmacy will never get my business again! Of course i'll still go to walmart for other things but I won't be visiting the Pharmacy again after I get the rest of my prescription!