My Zafira B Life has 2 remote fob keys. One of them dont work. The previous owner claimed it did then the battery died. I replaced the battery with the new one, tried the lock/unlock but to no avail. then i googled for answers & found that you could get the key to work properly by inserting it into ignition, turn it 2 clicks & press lock twice, remove key & try the lock/unlock but that hasn't worked either. Is there another method for reprogramming the key? i want to save £100 if possible by avoiding the stealers. Thanks