Always have somebody present (ideally a third party professional) when attempting to raise any issues of concern directly with or about a support worker. This is to protect yourself from any allegations which might come back at you as a result.
I have had two experiences of support workers making totally false accusations against me when I attempted to complain about their work ethic. Firstly, four years ago I spent six months in supported accommodation and had a regular support worker. We got on well, then she went on holiday for a week to NYC and the guy who was supposed to stand in for her failed to turn up twice. I went to his office to discover what had happened and he was very blase and unapologetic in response to my enquiries. He then asked me to leave the room (which I couldnt understand). The next day he made allegations to the housing provider that I had behaved aggressively towards him in his office (totally untrue). As a result I was given a warning and had to be observed by two support workers from then onwards. They also then failed to renew my contract due to these allegations when my six month term finished, so I was forced to rent privately.
Earlier this year in April, I decided to give supported housing another shot and signed a assured shorthold agreement with the mandatory provision that I had to accept weekly support. Initially, I got on very well with my new support worker but noticed certain behaviours that were unprofessional. She would tell lies about being off work sick (cancelling our appointment) then I would see her in the highstreet, she would wear a jacket saying "there are no rules" to work, she could be quite rude to me etc. After two months she asked me if I "wanted a cuddle" because I was visibly upset during a support session (depression) which I thought was inappropriate, she purposefully misinterpreted my financial information on a grant application to make it look more attractive to the funders and would be dismissive of my feelings and had no clue about mental health terminology.
During a mental breakdown in July she made outright discriminatory comments to me about my depression and when I felt I needed hospitalising she said "in my experience people very rarely get hospitalised" but was keen to stress she wasn't "mentally health trained" as she worded it. Firstly, I attempted to speak to her face-to-face during our session about these issues, but she denied everything so I mentioned I would be making a formal complaint. She literally ran out of my flat without stopping. A week later, as before, I discovered she had made completely false accusations on my notes of unstable and aggressive behaviour because she knew there would be a complaint made about her. I've now been informed, as before, that I will have to now be observed by two support workers. However, I did request my original support worker's removal as a "reasonable adjustement" under the Equality Act 2010, which the company were legally obliged to act upon. Unfortunately, instead of suspending her they are protecting her and I have a meeting with the management in two weeks time to discuss my support provision