yeelight and alexa on germany server not working

I moved onto a new broadband supplier today and have been resetting all my smart home devices. All work now except my two Yeelights. They work with the Yeelight app but not with Alexa. They cannot be discovered if I try and find them with Mi Home. They have the latest firmware. On the Germany server they can be discovered by Alexa but when I try and turn them on using voice or the alexa app I get a message saying device not responsive

I have tried resetting them to the Singapore server that they were on before but then Alexa cannot discover them.

Any advice

Hi, could I contact you via WeChat or WhatsApp? Please email us your amazon identifier with title “Apply for Yeelight Skill issue testing” to I will add you to testing skill for debuging. Thanks.