Housing Association Invoice- PLEASE HELP!

I moved out of a flat owned by a housing association on the 1st September 2018 and handed in my keys on the agreed date, the 3rd September. Prior to handing in my keys we had an inspector visit around two weeks beforehand where it was agreed we would leave behind a set of curtains, wooden flooring and paint which matched the bedroom and kitchen. At my closing meeting where I handed in my keys to the property, I advised what had been agreed and what had been left behind, nothing was said.

Fast forward almost SEVEN months later, I’ve received a recharge invoice for the amount of £381.82 sent on the 28th March, received on the 30th, to be paid within seven days of the letter being sent. The invoice is for a heavy duty overhead, two new internal doors and a clear out of the property/garden.

I have no idea what a heavy duty overhead is but I do know that the HA were aware that there were two sets of two matching doors; the bedroom and kitchen were the same style, the living room and bathroom were another. Over time the original kitchen and bedroom doors were dangerous (incredibly heavy and were splintered which happened before we moved in) so we replaced them. The inspector did not say all the doors had to match when we left.

The inspector said we were fine to leave the curtains, flooring and paint, as did the person who conducted my end of tenancy agreement. There was rubbish in the communal garden left by another tenant but this was outside of THEIR property, not ours.

Can they really charge us seven months after moving out of the property for ‘repairs’ or work they were carrying out that we were not made aware of before or even after the fact? They had in the past tried to charge us for rubbish they KNEW had been left by another tenant and we argued our case that time, so I’m wondering if they’re just trying it on.

Thank you for any help you may be able to offer.