Get the right information and leave innocent people alone

I received a call from on of their agents last week looking for another individual. I informed her that the number she called belongs to myself and not the person that they were looking for. The agent then asked if I know the person and if I perhaps have a telephone number for her. I said that I do and gave it to her and asked that my number be removed from that profile. Today I received another call (at 6:50am?!) once again looking for another individual other than myself. I once again told the agent that this was not the person who they were looking fors number and gave her the correct number again and once again asked that my number be removed from the profile. This is highly irritating as I keep getting phonecalls that have absolutely NOTHING to do with me. Please remove my number from your system with immediate effect. I am no one's PA that I have to answer telephone calls on their behalf and please tell your agents that just because they start working at the crack of dawn, that doesnt mean that everyone else does and that they should call within REASONABLE business hours (ie 8am-5pm) when everyone is awake rather than being rudely awoken for absolute nonsense.