FL is a 2-party state which means BOTH parties MUST agree. If you've got a nasty CA on the phone, tell them in advance that you are going to record the call. If they keep yapping, they're tacitly agreeing. Some will hang up, others will yell at you that you can't w/o their consent- which is true. If YOU hear a constant beep on the line when talking to them - meaning they ARE taping - and they don't ask YOUR permission to record, then turn on your own tape recorder.
In lieu of a tape recorder, keep a log of each phone call and write down everything that is said - its called 'memorializing' and its legal. Get a name (if you can) note the date and time, the company name and the subject of the call.