obviously she didn't mean to do it but it's outright neglect, which means she is just as guilty. why should you be out of pocket £700 because she was careless. explain to her why it costs so much, show her the equivalent from online shops/here/ebay etc. Say that you cannot afford to replace it and shouldn't have to and see if you can come to some sort of arrangement for compensation. leaving it alone will just build your resentment for her.
obviously she didn't mean to do it but it's outright neglect, which means she is just as guilty. why should you be out of pocket £700 because she was careless. explain to her why it costs so much, show her the equivalent from online shops/here/ebay etc. Say that you cannot afford to replace it and shouldn't have to and see if you can come to some sort of arrangement for compensation. leaving it alone will just build your resentment for her.