Terrible service since Skynet

I bought a laptop computer from TakeAlot about a month, which turned out to have a defective screen. Logged a return on the TakeAlot website on the 20/ 10/2018 and the collection was scheduled for the 23/10/2018. The 23/10/2018 came and passed and my parcel was not collected from my residence. I then called and emailed TakeAlot everyday until the item was eventually collected on the 30/10/2018. I called the contact center to find out if my computer had been reviewed and when I'd get an exchange and I was asked to send my proof of collection from Skynet, which led me to believe that my item had been misplaced or lost. Today is the 13th of November 2018, making it a total of 21 days since I logged my return. And every time I call or mail, I am being told the matter is under investigation. I am not sure where my parcel is at present, and the contact agents I have dealt with to date (Ryan Begbie, Renika Benjamin,Sheeham Williams, Carlo Newton, Dylan Daniels) have not been helpful towards, they keep making promises they do not keep and send me from pillar to post. I had a terrible exam season, because I was stressed out and had to deal with all this.