Originally Posted by nufc4life:
“is there any other way of blocking them ???”
Yes, fit a
Commtel Phone Guard on each active telephone socket in your house.
BTW, if this is an 'anti-teenager measure', beware, they can be very clever. Some 118 directory services offer 'call connect' (very expensive), the 100 operator does too and the use of 1471 or 1571 followed by pressing the 3 or 0 key is also expensively effective - so programming the Phone Guard(s) not to allow such calls is essential.