POOR PRODUCT and NO CUSTOMER SERVICE from PIRELLI

POOR PRODUCT and NO CUSTOMER SERVICE from PIRELLI and BMW - I have raise a serious concern with respect to the disintegration of the inside wall of the almost new a Pirelli Runflat tyre (recommended and sold to me by BMW Dealer - Lynn Schroeder Motors - George RSA) which occurred after ONLY 12,5 kms on runflat at +-60 kmsph (confirmation of which can be obtained from the vehicles, BMW X5, internal reporting system from when the warning came up on the screen until the tyre was filled with air to 3 Bar checked and reset before continuing, where after it held it's pressure until we arrived at work +- 35 kms further on - thereafter NEVER driven on again) which is in stark contrast to that stated and guaranteed by the Pirelli of 80 kms at 80 kmsph. Put in clearer figures it means that these tyres can actually only perform to 15% of their guaranteed and stated capacity - I would hate to have seen what these tyres would have looked like if they were taken to this limit not to mention the risk that it would have put me and my pregnant wife in. Despite numerous emails to BMW and Pirelli I have had no response from Pirelli, and BMW Dealership has had vehicle at their premises over a month