Terrible Service...Very unhappy

I ordered blinds for my home on 29/10/2020 from Game Westwood mall through a consultant named Njabulo who is employed by Decorland who is the Service Provider for the blinds. On this date I paid the deposit of R 2 500.00 I was advised it should take maximum two weeks for the fitment. After numerous calls for the fitment to be completed, they arrived on Friday, 27/11/2020 to do the fitment almost one month later, at 15H45... They come into my home with the incorrect sizes & insinuate that I provided the incorrect measurements!!! I told them to check their order form which they did & they then advise" Oh you're right, you did provide the correct measurements". The two guys from Decorland leave & my blinds are still not fitted. I then got in touch with Neville, Manager at Game, Watercrest Mall as I was advised that there are no Managers at the Westwood Branch...he advised he would get Norton the Regional Manager to contact me...which by the way I'm still awaiting that call! I've been a loyal customer of Game for many years & never did I ever expect to receive such pathetic service. I am a Claims Consultant for a very prestigious Brokerage & believe me I could teach Game a thing or two about providing service to a customer! Very unhappy customer...not sure if I'd ever shop at Game again.