Pathetic warranty support..

I bought defy glass hob January..3 months later the stove just cracks and technician comes and confirms the stove is faulty and defy will repair it under warranty.. a month later with no feedback, calls and emails don't get unanswered when you follow up..still to date my stove is not fixed...escalating to anyone doesn't help either..you get sent from pillar to post..service managers don't even bother answering their phones