In my experience organizations providing services to me for money nowadays ususally just send mail instructing me calling a central number where I can be in the 15th place of the call queue. In case they call they do whenever they please, which is the most inopportune occasion in most cases (in the loo, in transit, in a conversation, basically busy with life!). In best case leaving a message mumbling quickly in a sound quality sounding like sitting in a bucket in ungoverned Afghanistan, with the suspected sense of calling them back on the central number (incomprehensible).

Getting a procative call for my benefit would make me very suspicious about the authenticity of that call!