So here is the hard truth - because you are acting as a carer, very little will be done unless you actually create a crisis. if you really want to force the issue, you need to say (even if it's not true) that you cannot care for your mother anymore - you might need to contact social services and say it is an adult safe-guarding issue. They will then present to you as if you need to attend a lot of meetings, these are just to get you to agree to do stuff - don't go to any of them and stick to the line that you cannot care anymore - even tell them you plan to leave if you have to.
This truthfully and honestly will get swifter action than anything else.