Bad service - No Service - for repairs on a Grundig Oven

I bought a Grundig Oven, which was a lovely product till it stopped working. I was referred to Reachdin Projects by Defy, originally helpful - but only till they have to deliver service. I spoke to Nathan and Damien, I am very certain they cannot spell the word service - they are the 2 most unhelpful and careless persons I have dealt with in years! It is shocking that we must just except this poor quality of service!! I am struggling now for almost 2 weeks, they don't return calls, they don't come back to me with answers. Never the less it is quite disappointing that Grundig and Defy associates themselves with a company like this. I will never buy or recommend Grundig or Defy as a result of my dealings with this company.