There was a guy in our church who did street evangelism (not done much any more), anyway this guy (said he was an atheist) every week would hassle the church guy. So the church guy after months got sick and tired of the whole ordeal and got down on his knees and asked God to strike the guy blind. The atheist had a royal fit..claiming that it was horrible that the church guy would want him blind. So much for atheism.
Your church guy needs work.
No need for hassling [unless one has fun from it, but it tends to wear out]. One could establish the eye contact, wait for the pause needed to swallow the saliva or to catch the breath, and then cut in: “not a cent”.