Do Not Use - they make charges for services you did not have

Do Not Use - 2 months after my holiday I do not have a refund of £1250 deposit. They are claiming £100 for emptying a toilet cassette that I had emptied and cleaned, and definately not used only 15 mins before returning to the hire yard. The southampton team were nice, but the admin is incorrect and charging for services they have not o provided. When I tried to discuss they 'chat lines' were terminated mid conversation, and there is no escalation proceedure for complaints. I will be looking into legalities of service and breach of contract. Nursling, Mill Lane, Southampton.