It doesn't sound as though Sbos has grasped your basic point. Throwing money at the problem doesn't solve it and, for what it's worth, sending items on an evening delivery with a use-by date of the next day, suggests to me that it may be (whisper it quietly for fear of libel/slander or whatever) company policy. I don't like S very much as fruit, veg & bread from there never seems to last as long as from other places. Having said that, I'm going there tonight because I like their frozen finely chopped veg; when you use chopped onion, carrots & celery as a base for so many things, it's handy to have some ready-done. Perhaps email them back and tell them that until they have a similar policy, you'll stick with Tesco's?
I like the sound of the loo wallpaper and pink flamingos in the kitchen - very swish. I know what you mean about the property being your home but not your own, but I wouldn't let it stop you from decorating it as you want. Afterall, as long as you pay the rent and are not anti-social the HA can't turn you out, can they? You're in for the long haul unless you chose to move and are you likely so to do? (I'm in the same situation, but I'm a bit cagey about saying so because too many people only know of the stereotypes which are unfair on many of us in HA properties. Your property sounds palatial in comparison to our's which was also brand new when we moved in nearly 11 years ago. I've always said that it's not suitable for anyone who likes to do anything other than watch TV!).