Broken lids not replaced after 18 months wait

Tupperware has a liftime guarantee. I gave broken Tupperware lids to an agent approximately 18 months to 2 years ago for replacement. No feedback or follow up at all in spite of my pleas. I then demanded contact details of her supervisor. Since 21 Oct 2015 I phoned this supervisor every 2 weeks. She always promises to get back to me, but does not. After my fifth follow up call today, she wants to give me another number and when I got upset , she put the phone down in my ear. Is this the service and guarantee that Tupperware provides these days?