Why expansion conversations go wrong
The failure is almost always timing and framing rather than product fit. A customer receives a call about a bigger plan in the same fortnight that a support ticket sat unanswered, and the message received is that the supplier cares more about revenue than about delivery. Or the conversation opens with a package and a price, which invites the customer to compare it against alternatives instead of discussing their own situation.
The alternative is unglamorous. Watch for real changes on the customer side, raise the subject only when one appears, and lead with what you observed rather than with what you sell. That sequence turns expansion into a service conversation with a commercial outcome, which is what customers who buy more actually experience.