"UK consumers can opt out of receiving telemarketing calls for free by registering with the Telephone Preference Service. ®"
Apart from if you are a BT customer, then they still call you to upsell your "customer bundle" even after opt out
"UK consumers can opt out of receiving telemarketing calls for free by registering with the Telephone Preference Service. ®"
Apart from if you are a BT customer, then they still call you to upsell your "customer bundle" even after opt out