Contabo support escalated 4 times, still wrong answer

Actually I opened a Support Ticket with Contabo on April 12 because my Subdomain DNS Records were not propagating to the Secondary Nameserver or? The first Technician told me to flush my Browser Cache which actually makes no Sense for DNS Propagation. Then the second Escalation said I should wait 48 Hours even though 72 Hours had already passed. The third Tier asked for my Root Password which I actually refused because that has nothing to do with DNS Zone Configuration. Now the fourth Escalation Team sent me a Template Response about SSL Certificate Renewal which is completely unrelated to my actual Problem. My Zonefile shows the correct A Record but the Secondary Nameserver still serves the old IP Address from before the Migration. I am actually losing Patience with this Hostsupportbingo. Has anyone else experienced such complete Incompetence with Contabo Support or? -- https://contabo.com

I made VPS last month with Contabo also. Can you check if your SOA serial number is same on both nameservers, bro? Maybe secondary not doing zone transfer properly.

Guys this is why margins matter. I stopped using Contabo direct, moved clients to KnownHost reseller plan. Better ticket routing. Any leads on whitelabel DNS panels that actually sync both servers?