Power Steering Probz Please Help!!!

Okay, so Ill start by saying whenever I first bought the car early 2014 it was perfect and I had no problems. However, a few short weeks later I was involved in a wreck and the left front corner of my car was fucked up. When I would turn, the wheel would make a nosie and it would turn in a choppy, hesitant, resistant like manner, as if the power steering were cutting in and out. Anyways, I was able to get her looking pretty again however, I did not have the money to replace the rack and pinion at the same time it was in the body shop (because they said it needed to be replaced). In July, I replaced the rack and pinion, yet the power steering still did not even register. I still drove with out the power steering working because I had to, until I was able to take it to Mazda where they told me the EPS module needed to be replaced as well. Instead of spending 1200 at Mazda I purchased one on Ebay for way less and installed it. At first it seemed promising then, turned out to be worse. When I turn the wheel it resists very hard, but in like a copy way as a turn the wheel, in both directions, until going. off. I took it back to Mazda thinking it may just need a reflash. After a few hours they told me that EPS I just replaced was not giving any bad codes but the problem was still there. I gave them another day and they are telling me that the EPS was not even online any more, and that the rack and pinion is messed up. They also said they checked all my wires and the voltages were fine. Should I warranty out both parts and replace them at the same time???? Please help me IDK what to do anymore, I just got a lot of parts I want to put on but am thinking of just selling everything. ANY ADVISE??!