faulty router

Hi,

I am a new customer with talk talk, i am having problems with my router it appears to be faulty making the signal week and drop outs,
Iv had several conversations with talk talk trying to explain the situation where they then thought it would be best for a call out from an engineer which then leads to extra costs that i dont want, i just simply need a replacement router so i can enjoy my experiance with talk talk, not off to a good start