How to reset mimosa c5x

Good day, I have a mimosa c5x that I bought and I was changing the access code to it but at some point something happened and it didn’t look right, could you help me how I can reset the equipment or recover the password that was left. I have the purchase invoice a thousand thanks for your prompt response

http://client.help.mimosa.co/client-faq-c5-c5c-c5x-reset