Broken buggy, refusal to pay

The airline damaged my buggy, when I spoke with their agent at the airport he said that the airline would pay me back for the replaced buggy.

I reported the matter and provided supported supporting documents including the cost of the new buggy and the retail value of the buggy they damaged.

I can not find the receipt for the damaged buggy but I did provide the retail value from a baby store.

Now they are refusing to pay me back, is this what it means to be a worlds class airline??

Very disappointed