How do I escalate a complaint with the/a housing authority? Is there an ombudsman in the UK?

We are having major problems with the housing authority. When we informed them that we got married (both of us with housing needs) and moved in together, rather than make the simple calculation/adjustment, they stopped paying the landlord of our property. This was advice given by CAB. Tell them and they will make the necessary adjustments. This was in January. The boiler broke and we have had no hot water for four months. We have had several meetings (always with different people and told different things - denying we wrote to them telling them to admitting we wrote and told them and that they have a record of it). Basically pushed from pillar to post.Now they have paid the landlord all the rent backdated and he still is refusing to pay for a new boiler. The upshot is, he will if forced fix it, but then he will give us 2 months notice to get out. WE cannot afford the deposit and subsequent removal costs in addition of the upheaval of moving. These are costs they say they do not cover, yet this whole situation has been brought about by them? Also, my wife is epileptic and the epilepsy association have told her that where we live is unsuitable as she should not be walking up and down stairs and we don't have a shower, and their is potential for her to drown if she has a fit whilst in the bath. Can someone point us in the right direction please? Thanks