Delhivery Courier Service — Payment taken twice, not paying refund

Delhivery courier service delivered a courier, while paying on-line payment by gpay it was showing processing did not move to paid status, the delivery boy said pl make payment again or he will have to make payment from his pocket, so made online payment again, this time showing psid, . Soon they first payment went to paid status., so double paid. Now Delhivery courier service is saying they did not receive twice. Send screen shot of gpay status and bank statement, still no response.