Counter offer sent to tenants but no reply!

Hi, I rented out my Edwardian flat from 2017 to 2023 with as described in the inventory as ‘heavily aged ‘ windows and one window was ‘‘rotten top right-hand side”)

Tenants took on property happily renewed in 2019 and in 2020 complained of a broken window frame to me via WhatsApp as they communicated problems this way. I replaced it and they said ‘just to let you know the other windows are going that way’.

They renewed again in 2021 and 2022 and they emailed the agency to complain about mould-ridden other windows (the agency only collected the rent and did not manage it – I did)

I missed this email.

The agency rang me and I fitted a new window in March although it was ready in February but tenants handed in their notice so I waited a month until they were out.

They left the place filthy and battered!  It was as if someone had had a party there and trashed the place. Heavily worn.

Cost £14000 to re-decorate and put windows in.

The tenants went to no-win no-fee lawyer and filed a disrepair claim wanting compensation £13500 plus legal fees I’ve offered £3000 including legal fees and I’ve had no reply. That was 2 months ago, what do I do now?

Thanks,

Dione