Urban Company - ISSUE NOT RESOLVED EVEN AFTER PAYMENT IN ADVANCE

My AC was not cooling so I booked online gas refilling service of Urban company that included the checking of leakage and filling of gas, on ** June ****. The technician visited on the next day and filled gas without proper checking of the leak and said everything was good to go. The next day again my AC stopped cooling and then when I called the technician he told me that there is leakage in the ac copper pipe but when asked to open the sealing of pipe and to find the leakage and fixing it he refused and asked for extra money for the same work and also asked to change whole pipe instead of finding the leak and fixing it. I have already paid **** rupees including the gas filling and the service charge and now I want the refund of the amount that I have paid to the company as I am very disappointed by the experience and I am not getting any proper response from their support team as well. Please help me in getting the refund of the amount I have paid so I can get the issue fixed from somewhere else as it is mentally exhausting to take constant follow-up regarding the service for which I have paid already and that has not yet been done.