It depends where you live really. You can usually find places that offer refills on things but they tend to be vegan supermarkets or littlw independent stores. Remember you can take bottle tops to Lush who will recycle them, reveal large branches of marks and spencer now offer recycle points for food packaging that isn’t always accepted by the council.
Basically you need to avoid supermarkets, go to a green grocers for veg, but a reusable bottle (a metal one later longer and doesn’t yet more plastic), I use castille soap for pretty much every cleaning use I can think - washing up, washing clothes, as a cleaning spray, and use white vinegar for cleaning windows etc so instead if tons of cleaning products I have two natural ones and that drastically cuts down on plastic. Not plastic but when a theory wears out I cut it up for clwnakng cloths that I wash and never buy disposable ones. Bake my own bread so that avoids stupid bread plastic bags. When I think of a better list to help you I will but I just try to buy natural wherever I can on all respects which largely also cuts out plastic in the process.