No, your team leader was wrong. As Jim suggested, a bit more "robustness" is in order. Just because a company carries insurance, that doesn't mean that everyone else should simply shrug their shoulders. In my humble opinion, if the rep can't demonstrate that the kit has been serviced, and, in fact, can't see any merit in equipment servicing at all (!), then the kit stays firmly
outside the door!
Remember that
you are the customer. You don't have to justify your actions to
them (the vendor). The boot is squarely on the other foot! Any talk about "partnerships" and stuff like that is just BS. They are trying to sell their equipment, plain and simple. And they'll be laughing all the way back to the (sales) office if you allow them to "put one over" on you.
Meanwhile, take a look at
this previous thread.