I’ve suffered from this for years, had loads of tests in hospital, got diagnosed for a while with BPPV and then Menieres Disease. Still not found an answer or a cure though.
First step is to get rid of the ear wax build up though as it might just be that. Think GP surgeries have stopped doing it but you can get it done privately, it doesn’t cost much. Heat up some olive oil, pour it into your ear and let it soften up the wax. Do that for a week. A lot might go naturally but if it’s still blocked, then when they do the ear syringe, it’ll come straight out.
If you don’t do it, then it can hurt and cause a bit of damage.