Toco warranty service company Refusing to pay for parts and services thats covered under warranty West Hills California

I brought my 2003 ford explorer xlt haven't had a year yet. I had in shop 4 different times since i have toco warranty on vehcile. I was never told anything was wrong with motor. I had 3 oil changes on vehcile since i had it. 1 oil chnage by 5 mintue oil change shop and then other 2 by me. I always used syethnic blend or high mileage oil. Like 2 weeks ago i was coming home the oil pump guage on dash keep moving up and down. I got it home and checked oil pump went out. So since i have covered warranty on vehicle i was gonna take to shop the next day. The next day i went to start suv it won't start. So i called toco they had tow truck show up to take it to shop. The shop called to state the oil pump and timing chain went out and rod in motor. So since its a closed unit i will need a new motor. So i dropped off warranty paperwork at shop so they can call toco to file so i can get vehcile fixed. Shop called me back and requested 4 oil changes documents. Well i gave copy of 5 minute oil change and told guy i changed the other 2 times and didnt have records. I didnt know i needed to have that record to beging with. So he turned in oil paperwork and then toco refused to pay for parts claiming i didnt put syenthic oil blend in vehcile it's my fault motor went out. I had suv in shop 4 different times to be looked at. Shop dont keep record since i didnt have services done on them days. The purpose of having warranty cover is to help when it is needed. I didnt know the company would refuse to pay for parts and services that is under contract. So my suv been sitting in my yard since. I'm a senior on a fixed income. I just want my suv fixed and back on the road.