cashe app online loan service - refund

Hi, it is an online loan app. I borrowed * times. Even now there is a debt going on. On **th June I sent all my EMI through their app. I mistakenly sent an additional balance. Then I asked them to refund my excess money. ****. They responded to my email saying they will raise the ticket and refund your money within ** hours. But they still haven't refunded my excess amount. And I have sent them reminders more often. But no one answered me. I have been waiting for my overage refund for about ** days. But they don't answer me. I am a middle class family, how can I manage. Kindly do the needful. Take my money from them.=O>z=-