I buy all my film (except for special stuff, like Efke Aura film) from one of three local retailers. My favorite is Tempe Camera, a two story outfit, that carries many, many types of film, refrigerated if necessary, or not, if not. They are not as cheap as online but not so expensive as to be ridiculous.
It's seven bucks for a roll of delta 32, and seventeen bucks for a ten pack of 11x14 Ilford multigrade fiber paper. They don't take any sensitized materials back, and big signs there let you know that at the point of sale. I think if you are a new customer there, they remind you before you pay.
Recently I bought a roll of trix at CVS pharmacy (I mean, it's cool that they sell it there but ...) for an exorbitant price (like six fifty for 24 exposures!), where they DO allow returns. It was Sunday, and I needed it really bad! So I paid and took it. When I developed that film, I was unpleasantly surprised that it had a base density similar to burnt toast. The contrast was so bad that I had to use a four and a half filter to print it!
I surmised that they had taken the film back, after someone had driven around with it in their car, in Phoenix, Arizona for a week, where the interior of parked cars can go over 140 degrees in the summer.
Now I am glad that I had a 4.5 filter, but I would have liked to have had a bit more latitude for contrast correction with that film. Thankfully, the grainy look is what I was going for, but now I NEED to shoot the rest of my project on 3200 film!
The lesson is, shop at reputable dealers, where you KNOW the storage history of the film you buy.
And quit picking on the OP, who was just learning.