istore apple repairs poor service

My MacBook Pro was recalled for the screen. I took it to the istore at pavilion on the 17 December 2018. The last email received on the update was on the 24 Dec. Since then I have called and was told by the consultant that I will receive my MacBook back after Christmas. To date I have not received further communication from them I have had to call four times to get feedback on when I will receive it back. Today is the 4th and upon calling it’s sitting in quailty control and upon chatting to the consultant they cannot tell me when I will get it back. Very poor service and communication-totally unacceptable.