Are either still within their return window? If so I would replace the monitor for one with DisplayPort or the GPU for one with DVI (Dual Link).
If not. The best you will get is an "
Active" DisplayPort to Dual Link DVI adapter. The only one with decent customer reviews run around $100. Those cheap adapters DisplayPort to DVI adapters only do 60hz.
https://www.amazon.com/StarTech-com-DisplayPort-Active-Adapter-Converter/dp/B00A493CNY
Note: The reviews for the various models are grouped together. Just get the DVI (Dual) model not the cheaper ones you see. Some reviewers note problems with 144hz. I don't know if it is a problem with the adapter. Or if the Amazon's grouping the other adapters under the same reviews. Mislead people to think the cheaper adapters would work at 144hz.
This adapter is actually rated for 120hz at 1920x1080. Reviews report 144hz works. I know of no true 144hz rated adapter.
Frankly, if the monitor can't be returned. I'd sell it. Then combine the money with the cost of the adapter. Instead get a proper DisplayPort compatible 144hz monitor.