Housing

Hi,which
My very very elderly mum had a rat trying to jump on her bed while she was in it.
I only discovered the rat because she was unwell and I had to stay overnight to tend
to her needs, This was around 3am in the morning so I had to get help to move her from the
downstairs room where the rat was to upstairs as she is disabled and cannot move around without two people's help. Upon getting upstairs in one of the other bedrooms I also discovered another rat,
I got hold of the council later that morning as her landlords are the housing community because this was during the pandemic - Lockdown. Council informed me that they cannot enter the property and therefore could not deal with the rats. As this was an emergency as rodents are a hazard to health and she is fragile and lives on her own I had to help her get someone private to attend to the rodents.
I informed the Housing community and they told me that removing rodents from the home was up to the tenant to do, In her tenancy agreement which is a standard terms and conditions agreement there is nothing that states that either tenant or Landlord should remove rodents. The root cause of the rodents getting in was through a hole in the external wall of the home.
My mum had to pay a large sum out of her pension that she could barely afford to get the rodents out and ensure there were no more rodents in the house.

I have requested the Housing Community to reimburse her because she needs to use her money for her ever increasing needs due to her disability and I'm informed they would not do it because it is not their responsibility to get rodents out. I have told them that it is impossible for a disabled elderly person to deal with the situation and that rodents are a health hazard and does not make the property habitable and that the government had mentioned that during the pandemic Landlords should ensure properties are habitable this has been to no avail and I feel their reasoning is not justified especially since it's not specifically mentioned in the contract that it's up to the tenant.
Could I kindly get your opinion on this?