Unpolite cashiers always uninterested

Cashiers at the till are very very unpolite. And this isn't the first nor 20th time I've experienced this. They never greet me when I say "Hello", they never make eye contact when speaking and they never seem interested in their own job. I always shop at Checkers but with this not being addressed, I will no longer shop there. If the head office don't mind losing one customer, there are hundreds of people that have said exactly the same as myself. Checkers are losing customers and I will make sure they continue to lose them until something is done to address this matter.