Refusal for refund

I have ordered four lenovo laptops for my staff, in the same month. Two of which are not working optimally, I have contacted Takealot and sent both laptops in for repairs - one laptop, nothing was done, after two weeks, the laptop was returned with the same issue. The second laptop, was with providers for over a month, and was returned in a worse condition that what it was sent in. I have logged returns again both requesting a refund - I am told that the issue cannot be dealt with takealot, but rather with the supplier, and that a refund cannot be promised. This is appaling, this entire process is holding up my business and my staff cannot work this way, the delays are ridiculous and there is no sight of resolution. Lenovo has attempted repairs on both laptops, twice now, and each time the devices are returning in a worse condition than when sent it. Lenovo is refusing to refund me for these laptops.