This is a bad situation that you have encountered with a very poor quality of care.Suggest as has been said , that you work your contractual notice.If they start getting stroppy about the fee, inform them of the things you have seen which are contrary to good practice and let them know that it is your intention to report these facts to the Care Commission --leave -- and then do it.Keep a good record with dates of what you have seen , and keep this at home. Good luck
The care industry need a few more people like yourself who can object to bad practice.