Is that digitalserver.com.mx or hostingsource.com? I mean a trustworthy dedicated server provider ... any ideas?

The more providers you check the better choice you will make.
I recommend you to have a look at
https://gthost.com/instant-servers
They have good dedicated servers

If you ask me -  I would chose and go for hostingsource.com. They are one of the oldest providers that I know.

Choosing a trustworthy dedicated server provider is crucial for ensuring reliable performance and data security. Look for providers with a proven track record of uptime and customer support responsiveness. Transparency in pricing and service level agreements (SLAs) is essential to avoid hidden costs and ensure service reliability. Assess the provider's data center infrastructure, including redundancy measures and physical security protocols. Reviews and testimonials from existing customers can provide insights into the provider's reputation and service quality. Lastly, consider scalability options and flexibility in configurations to accommodate future growth and changing business needs effectively.

M2host's dedicated server is the best and most affordable option. Our basic plans start at just $99/month and include services like 100% Uptime Guarantee, Enterprise Hardware, Choice of Operating Systems, Unmetered Bandwidth, and many more. More information is available on our website. Please visit our website.

I vote for hostingsource.com.
Great reliability, the support is good, sustainability, the uptime is high, the speed is great.

Both digitalserver.com.mx and hostingsource.com seem to be relatively unknown players in the dedicated server market, and I couldn't find much information about their services or reputation. I'd advise against choosing an unproven provider, especially when it comes to critical infrastructure like dedicated servers.
You could consider Hetzner, a German-based hosting provider known for their high-quality dedicated servers at affordable prices. They offer a variety of server configurations, including AMD EPYC and Intel Xeon options, with up to 1 TB of storage and 256 GB of RAM. Hetzner's data centers are strategically located in Europe and the US, providing reliable connectivity and scalability.

Try out MyResellerHome web hosting service. Our dedicated hosting plans include services like cPanel/Plesk, free SSL, free WHMCS, 100% uptime guarantee, and more. For more information, please visit our website.