very very bad service

I took my x box in for repair to toys r us they send it away and the first time then i got it back and i had it 1 day and it did exactly the same problem that it was send in for the first time then they send it back a second time and i got it back again and i had to pay again i did not use it when i got it back from them but after a week i decided to See if it was fix and again the same problem then the first time so i took it back for a third time and then i lost it they then said the third time it was the av cables that needs to be replaced so i went and bought a new set but the x box still has the same problem then when i send it in the first time i think that they are not experience nor professional i would like a call from toys r us head office