So test drive went terrible

Went to purchase a 2026 new hybrid carnival. So car did not accelerate fast on highway even though i had petal to the metal and on sports mode. Once we stopped at the red light car started and tried to go again car started going backwards. The dealer said car was in some "dealership mode" and required a kia mechanic to take it off ....they also said the other car they had spare was also in the dealership mode. From what I seen dealership mode doesn't cause these issues, so feel like i was lied to. Wasted 3+ hours not counting 2 hrs commuting round trip . They want me to now come back tomorrow and im a bit livid at the whole situation. In addition financing wasn't what was promised was suppose to be 2500 off with 2% interest) then they told me they cant combine deals. I was told i can lease to buy for 36 months at 0% then finance 2% after... but im skeptical if ill actually get the 2% after 3 years... curious about you guys thoughts on everything. Tbh im rethinking even if I want this car after the test drive.