Google Agency Support is mostly for Google Badge holders
This means you have to meet with certain requirements (see: https://support.google.com/google-ads/answer/9028815?hl=en-GB)
If you don’t meet these requirements even if you already might have a badge, you might suddenly loose support from your dedicated contact at Google.
Most of the time your point of contact within Google (regarding smaller Agencies) changes every 3 months. This means every 3 months you have to explain to your new contact what you do, what your goals are for a specific campaign etc etc….!
Sometimes after having support for 3 months suddenly you notice you don’t have any point of contact anymore because they have decided to no longer support you at all for various reasons not always very clear why.