ASICS gel nimbus 24 poor quality

Hi, I bought a pair of gel nimbus 24 running shoes which retail at R3500. The heel showed terrible wear after only 100km, which is nothing. No response to two emails to ASICS SA in Blackriver park. As a long-distance runner, ASICS service is not impressive. Please do something that will make me stay, as I am so tempted to go to another brand.