Domino's Pizza — domino's 30 minutes delivery scam

On 1st may 2019 i ordered a pizza from kadubeesanahalli, bengaluru outlet at 3:16 pm, but my pizza reached at 4:01pm. According to the policy if the delivery is done after 30 minutes then the pizza should be free and the same was showing in my domino's app as well. When the delivery guy arrives he said that the policy has been changed and now its 1hr delivery guarantee. I called the outlet and talk with megha who attended my call and she also told me that they have changed the policy and for 1st of may its 1 hr delivery guarantee.
Even if the policy is changed then they should have informed me before but they didn't, and even in my domino's app it was showing 30 min delivery guarantee.
Please refer to the screenshot below

Please help me in this situation and refund my money.