Front Seat Belt Retractor problems of the 1999 Volkswagen Golf

The problem is that the center rear seatbelt retracts and will not come out again. The first time this happened, a dealer (not the purchase dealer) was able to repair it, but it failed again, and was replaced. Now, a year later it failed yet again. I have three children, and cannot drive with them in the backseat (one is 13, so he can ride in front), but it is a real and recurring problem - now the car is out of warranty, and it is a slow and expensive process to have this same part replaced repeatedly. There clearly is a manufacturing defect here. Thanks - jacob heller (631-689-8243) jheller@alumni. Sunysb. Edu.