Game service is very bad

I went to Game Mall@Reds in September to purchase a TV unit, there was no stock apart from the display unit, I then went to customer service to get a call back voucher, I waited for nearly 15mins and no one came to assist me I then had to go to the cashiers to ask who can assist me, they announced for someone to come we waited no one came, I went again to ask for assistance eventually someone came, I was given the call back voucher and 1 month later no once calls to notify me the stock has arrived. Really horrifying service.