Repairs of R700 done without permission.

I sent my Fossil watch in on 25 January. They advised me 6 - 8 weeks, which I know is normal. There was something wrong with my watch. I then after 6 weeks phoned to follow up on my watch and was told another 2 weeks then I phoned again to be told another 2 weeks. TODAY I get a phone call that my watch is ready for collection and it will cost me R700!!! How on earth do you repair a watch with a cost of that amount and not first ask the permission of the client. I was then told 'that is how Fossil does it' So is this supposed to make it right. I asked for the contact details of Fossil and I am still waiting. I want my watch back fixed and I will not pay a cent more than what I should as I was never asked permission to be charged this amount. I expect a reply asap. Surely there is a lifetime guarantee on certain items of a Fossil watch