Urban Company — No call back or service for post service issues

I had booked a professional through uc for washing machine repair. However, even originally, the company took took long to send the professional. After many days the service was finally completed. I had paid for 90 days service guarantee. The same issue has occurred again. Under service guarantee, i have been trying to contact uc. The called back on 03sep20 confirming that a professional will come at 1300 on 04sep20. He did not come. I have been trying to contact uc since then, but neither are they calling back not any contact with the professional. I had raised a complaint on the uc app. The closed it without resolving the issue. I have no way of contacting them since they won't call back.