fuel pressure

im not sure what to do about a month ago my warranty ran out on my 2000 blazer and so did my luck. i was in new jersey where youre not aloud to pump your own gas and i had filled up the next day it was about 98 out and when i got in the car and started it up i realized that the idiots at the station didnt click the cap three times and now my pressure is all screwed up it seems like when its hot out the gas gauge is off completely unless its full but when its cooler its not as bad how can i fix this they told me whn i bought my blazer always click it three times so i click it like 20 at least 15! or it would have to be reset it even says it on the cap and now there is no way to prove that the station is liable im screwed damn blazer also has anyone elses seat levers kept breaking my cousin has a blazer exactly like mine except white her passenger side has broken 1 time and both of mine have broken one time