The six objections, and what to say instead of arguing
An objection is information, not rejection. Argue with it and the call is over; answer the thing underneath it and it usually is not.
The technique
Nearly every objection you hear is one of six: no time, no money, already have it, do not trust you, need to ask someone, or not interested. Each has a real question hiding inside it. “I already have broadband” means “why would I change?”; “I need to ask my partner” usually means “I am not convinced enough to defend this to someone else”. Answer the hidden question in one sentence and return to the beat you were on. Never repeat the offer louder.
“Of course; what will she want to know that I have not covered? … Right, so it is the contract length. It is 18 months and you can cancel in the first 14 days for any reason. Is there anything else she would ask?”
The objection is treated as a real question, answered specifically, and handed back. No pressure, no second pitch.

What goes wrong here
Tally which of the six you actually get