Turned off one me replaced fuel pump starter does t want to turn over but the starter and relay are fine the fuel pump doesn’t turn on when I turn the key

So, my check gauges light came on oil light was moving low to high. I checked I didn't see oil I went to get it changed guy said low to no oil wth. I was due for an oil change the 20th but it broke down fuel pump went out. So now he says oil is under the vehicle parts? Why what? I never had a leak b4. Strange. I'm keeping an eye on it but need to get that looked at. Smh just spent $700+ plus to get fuel pump & battery replacement. I'm not happy. 🙄😡🤯😫