DNS records not found i want to change ip address

This could help:

https://support.cloudflare.com/hc/en-us/articles/200169096-How-do-I-add-A-records-

Since your A records already exist, search for www and click on the IP address. Atfer that you can change the value to the new address. Do the same for @

Make sure to select the correct zone before.

@sandro
www.londraimmobili.com shows a 502. I guess it’s simlpy the wrong zone on the screenshot,