The worst support Ive ever experienced

Im using the app with my MBP and iPhone: when I changed my MBP with a retina display model the iPhone app doesnt works anymore. PP slides doesnt show correctly on the iPhone. Ive written to Didonai support, but after a few answers and few request to send crash data nothing happens…Ive written one email each week for two months: no answer. Ive payed for an app that I cant use.

AmericaCube about MyPoint PowerPoint Presentation Pro, v1.2.1