Hi there, sorry to hear about the issue with the gimbal. Firstly, please check if debris or a part is stuck in the gimbal. Secondly, please restart the aircraft and then recalibrate the gimbal.
If the issue persists, you are recommended to send back the aircraft to DJI for diagnosis.
You may start an online repair request on our official web and then send it back. Here is the link: https://repair.dji.com/repair/index?site=brandsite&from=nav or contact our support team at this link: http://www.dji.com/support to open a case and then send it in.
Please be advised that due to COVID-19 prevention and traffic controls, product repairs and shipment times are expected to be delayed. Thanks.