Dishwasher under warranty, but giving so much problems

On the 02/12/2020 I logged a call with Hisense service department as my Hisense dishwasher was not draining. A technician came out. {ticket reference number is 763136} On Sunday morning 06/12/2020 I noticed that the dishwasher “makes a high pitch noise whilst on. “ I immediately logged a new call and attached a video, as this dishwasher is only 1 year old and is still under warranty, and already I am having so much issues. I received a new ticket number….. {Kindly note we have received your request and your email ticket reference number is 766265.}

On Tue, 8 Dec at 3:09 PM, I followed up via email, as 2 days has pasted, and no contact was made with me.

I received an email from, Thuli Ngema , stating the following… “A technician has completed the job, it was done on the 03/12/2020, they've fixed the loose pipe, if the problem still persists, please let us know. ’

I immediately emailed her back as, this is incorrect. Two different service calls where logged for 2 different problems.

Are emails/correspondence not been checked????. Why assume that it is the same problem, and just close the call. It takes your department 2 days to respond to an email. Don’t you STRIVE FOR “FIRST CALL RESOLUTION”

I called at 8 again this morning ,09/12/2020 and spoke to Lilian. She was supposed to confirm with the technician what time they will call me, as this is a repeat call. Then she was going to call me back at 9 this morning. I still have not received any calls. I am still waiting.

Your services are pathetic. Can someone attend to my query ASAP.