You got lucky with where it dented the oil pan. It missed the sump by 4-6 inches. To replace the axle and the oil pan yourself it would cost less than $500. If there is nobody damage then have the insurance pay to fix it. It wouldn't hurt to have the oil pump replaced as well. If there is any body damage or the AC condenser was hit then it could total the car without knowing what year or trim level you have. My 2015 mirage was totalled by hitting an 18 wheeler mudflap that blew off the road surface at around 60 mph.
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View my fuel log 2015 Mirage DE 1.2 manual: 38.6 mpg (US) ... 16.4 km/L ... 6.1 L/100 km ... 46.4 mpg (Imp)