Dissatisfied customer again

With regards to my previous complaint regarding my Hisense cellphone I purchased from the Pavilion brance , it seems that the floor manager ,store manager (Timbela) and the area manager (Saardia) are unable to assist one of there customers with their complaints but rather take supplier side ( knowing that the supplier is at fault) and make the customer pay and be inconvenienced, they in senior manage positions but can't make or take a simple decision , each of them give you the excuses but not will to rectify the supplies mistake , only way to help, according to them is to make me pay and be inconvenienced because of the supplier (Hisense),

Please is there anyone with higher authority that can help me resolve this issue , as the store manager and area manager can't help