I agree that it's very unprofessional and not at all what you want.
It's your house and your knee and you don't have to have these people visiting you at all. So phone their company, and tell them you don't want any nurses to call. Tell them exactly why. It's over a week since your surgery and you shouldn't need a nurse visiting anyway. If your surgeon doesn't like that, tell him you won't have someone coming into your house dressed in a way that could introduce infection.
Take charge of your own recovery and get the care that you want and need. Do you have anyone to support you in this -Husband? Friend?
Also, talk to you OS (refuse to discuss with his unhelpful PA) or your PCP about getting better pain relief medication.
Meanwhile, look after your knee and try to decrease its pain, by doing a bare minimum of exercise and spending most of your time resting, icing and elevating. Ice is very good for helping damp down the pain.
Your knee needs time and gentle treatment to recover. My surgeon doesn't allow any PT for the first month after surgery, because he says your knee needs that time, to start on its journey of healing. His patients all do well and he hasn't had to do a manipulation to help with ROM for the last 4 years.