I order mine whenever needed (repeat prescription) I’ve never had a problem with them declining , I order 1 box every week and that tends too do me for the week
Mostly two a day, waking and bedtime, as I have a Freestyle Libre and only eat one meal. DAFNE said at least 5 a day. But they suggest eating three meals, and not LCHF.
I get 2 months's supply of test strips at a time, a total of 300. I have to go to the chemist's too often as it is, so one box a week would drive me crackers. I have better things to do !