Https on on amason EC2 with OVH CDN

My domain is register gandi.net, but DNS is on OVH.com because previously the website was host on OVH. One year ago, I move the hosting on amazon. I setup the certificate on amazon Certificate Manager, and everything was working fine. I use it on load balancer pointing on EC2. DNS is still on OVH and the https of the website working fine.

To day I discover that, I still paying CDN on OVH. I disable it and discover a security warning on my 'www.' domain but not on my 'test.' subdomain.

On chrome , I check the 2 certificate, www pointing on a OVH certificate and 'test' that work pointing on amazon certificate.

I restore the setting on OVH, but nothing work , my www pointing still on the bad certificate.

Amazon certificate work.(on test subdomain and it's to be the same on www, because its a *.domain.com certificat)

I strongly suspecting OVH CDN but the hosting wasn't at OVH since a long time.

Any idea ressource ?

I clean cache and change navigator, ..