Why is this taking so long?

I have been to both Willowbridge (Durbanville) and the Cresta Shopping centre branches, the staff were very nice and friendly, but I need a replacement part (board) for my Lenovo laptop (1 year old). They both told me they would contact the supplier and get back to me with a price. I never heard from the Willowbridge branch and it's been 2 weeks since the Cresta branch said they where waiting to hear from their suppliers. I can understand the part might take a while to get to the branch but not getting a response from the supplier? This is just terrible customer service, I have returned to Cresta branch to follow up because when I call they just say "the tech guy will call you back" this does not happen. My first visit to a computer mania with this problem was 3 weeks ago, still nothing.