shady insurance call

Just had a call from *** Person tried to sell me insurance on the handset, \ on behalf of Vodacom\".(despite the fact that the handset is almost 2 years old.) I must give permission to activate the insurance, and only after this has been done, will they email me the policy details after 30 days. The first month is free, and if I want to cancel the deal, I have to go into a Vodacom store to do so. They have my ID, my home address, banking details etc. How is this acceptable ?"