Telemarketing hazards

Apropos the letter "Telemarketing hazards" (February 13). Sometmes I receive up to fifty text messages daily from telemarketing organizations. I cannot block their messages because no phone number is provided.  Even though I personally visited some of these companies, and they said they would stop sending messages to me, they continue to do so. I even asked my cell phone service provider-which says in its advertisements that it is our country’s largest cell phone service provider-to block them but they said they do not have the means to do so. Perhaps some legal expert could help. 

Shakir Lakhani
Karachi
Dawn, February 17, 2020

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