Poor service and extensive time period in upholding/honouring guarantee on TV

I bought a JVC 65" TV in July which wasn't cheap. The TV is faulty and was this was confirmed by the technician sent by Game to check the TV. Obviously the TV is still under guarantee. Game have been very good in following up from their side and sending a technician through to inspect the TV. In following up today I am told it now has to go through Nu World who is the company that upholds/honours the guarantee. The contact person there is Irene ***). This can take up to 21 days plus (they not sure how long it will take) to come to a decision on what to do. Can it really take so long to uphold/honour a guarantee! This is really disappointing, one can only hope that they will honour their guarantee in a reasonable time,