AIBU in thinking emails from a company should be spelled correctly?

Yesterday I was researching some new bedding. Found some I liked, but they only appeared to have the usual 2pillow cases with a double duvet cover.
So I emailed Dunelm and asked. They have kindly emailed back and say I can find the information separately under 'Pillowcases'. ?? Why isn't this with the bedding info?

Their reply is as follows:- and I quote,
I am sorry to hear you was unable to find the pillowcases for this bedding seperatley

It just is so shoddy, and doesn't reflect well on the company.