telemarketing
noun /ˈtelimɑːkɪtɪŋ/
  /ˈtelimɑːrkɪtɪŋ/
 (British English also telesales)
 [uncountable]- a method of selling things and taking orders for sales by phoneTopics Businessc2Oxford Collocations DictionaryTelemarketing is used before these nouns:- call