While it is true that they can only legally call between 8 am and 9 pm,  the 3 call a day is an urban myth.  But here are the two laws in question,  If you are right, you are welcome to point out the relevant section:
http://www.ecfr.gov/cgi-bin/text-idx?SID=7fe4 ... 310_14&rgn=div8
http://transition.fcc.gov/cgb/policy/TCPA-Rules.pdf