[Gelob]

If they take phone orders you could just play a pre recorded messages and call them using twillo. I've done this in the past to call many stores and check inventory of an item

[tqkxzugoaupvwqr]

How does this work with a conversation? Did you ask them to press 1 if the item is in stock, or send you an email to a provided address?

[sahkopoyta]

You could start the message by explaining your situation. But yeah still lots of edge cases this doesn't catch.

[callalex]

Twilio has different verbs you can use to quickly and easily throw together a small voice controlled phone tree with basic conversational understanding.