I agree that it is not worth hunting down the correct endlinks and investing yet more money on this watch. TBH, we don't even know if there is a 7-link BOR endlink that fits the case. It may not be the correct bracelet. These gold-filled cases were unfortunately not made to last, and that one is totally ruined. You definitely should not pay to have it serviced. The bracelet looks decent, but obviously not very useful without endlinks.
Next time, you might consider asking for feedback before purchasing. Fortunately, you didn't spend a lot of money.