False advertising-Netflix voucher

I recently received an sms & email from Telkom saying I received a complimentary 3 month voucher for Netflix for being a loyal customer. I followed the instructions to sign up, only to get an error message. After contacting Telkom sales, the operator says I do not qualify for the voucher as it is only for Telkom customers that signed up or upgraded in July. When I asked her then why did I receive the email, she says" all customers were sent the message" Telkom why would you send the message to all customers, that is false advertising!!!