[quote chesirecat99]OP, you need to take a step back and be cool and collected. It probably wasn't a good idea to refuse the viewings. You need to give the landlord more than 24 hours to reply. If you are obstructive, you are less likely to get what you want as you will annoy the landlord.
The agent sounds like an idiot. Of course, any correspondence you have with the landlord isn't "worthless". You do indeed have the legal right to refuse access for viewings, as you have a statutory right to quiet enjoyment. However, you signed a contract that agreed to allow viewings. A contract can't override your statutory rights so you can still refuse viewings, whatever it says. BUT you will be in breach of contract so you are liable for any losses the landlord incurs as a result of that breach. If refusing viewings means that they cannot find a tenant to move in immediately after you leave, you could be held liable for the lost rent for any void period.
I think you may have already burned your bridges with the landlord by digging in your heels and refusing point blank to repaint but maybe, if you swallow your pride, you might still be able to use your improvements as leverage in negotiations (they won't count for anything with the deposit scheme).
You need to bear in mind that the landlord has no idea that you have been doing all the maintenance work yourself nor (I assume) that you are planning on leaving things like (high quality) light shades and curtain poles that match the decor. She also thinks that she did you a favour by letting you decorate as you wish and you have gone back on the agreement to repaint it.
Use this guide to illustrate how your improvements have saved her money eg the lifespan for the original carpet was 5/8/13 years (depending on the quality), hardwood flooring has a much longer lifespan, so show how much it would have cost her to replace the carpet multiple times to get the same lifespan and how much it cost you. Show her that is expected that landlords will need to redecorate every 5 years and how much you have saved her by decorating yourself. Tell her how much you paid for the maintenance issues like the path and improvements to the garden (send photos). You could also point out that you have saved her 9 years of marketing fees as she hasn't had to relet (get the figures from the letting agent website). You need to be rational and make a financial argument rather then getting emotional and being difficult.
www.tenancydepositscheme.com/wp-content/uploads/2021/03/Product_Lifespans_Guide_NRLA_version_Updated_Feb_2021.pdf[/quote]
Fab advice, thank you!