Optima SW Diesel Automatic Problem Home Stop

Hi everybody, I’ve been driving a Kia Optima SW Diesel 1.7 automatic for 3 months as an annual car bought by a Kia representative. I drive the week over short distances and at the WE even longer distances more than 100 km. My problem is the start stop automatic which is not working at the beginning. The car was in the 3 months already 3 weeks at the dealer to get that under control now have a new battery installed. Still can’t, now they tell me that I have too much shorts Does anyone have similar problems or can someone help me? Thank you in advance