No response from AppleDTS

I've reached out to AppleDTS for code-level support on Dec 19th 2023. It's been 3 weeks now (Jan 11, 2024). I sent a follow-up 3 days ago, but no response yet. Their response time is supposed to be within 3 business days.. experiencing this level of delay in a paid support is disappointing.

I'm not raising a new TSI but resuming an old one after almost 8 months because it is a continuation of the same problem. Delayed response from my side is a problem? I hope not (I didn't find any restrictions in the documentation).

What should I do in this situation?