What sort of response do you think I should be looking for from cold calling? Any time I hear stats like "only 1-3% of calls will lead anywhere" it seems like a massive time-sink. But maybe that's unavoidable?
The key here is not to sell but do research. Perhaps you might devise a short questionnaire to research the general area addressed by your startup idea within the context of your potential customer's business.
You will find that people are surprisingly helpful if you are clear about what you are doing and clear that this is not just a disguised sales pitch.
If not, consider a pivot. But here again you have to do your market research. Again you have to talk to potential customers and find out if they are interested, how they would like to access the service and how much they might pay for it.
There is no way you can avoid this. Your pivot has to be positive or you are just wasting your time.