Please help. :(

Okay so my selling rating is on a down ward spiral and I'm doing everything I can to get On track and resolve issues with customers opening item not recieved claims. Including sending there items even though ebay has refunded them. My dad died unexpectedly a couple of weeks ago and as a seller on 100% positive feedback. Since I started selling beginning of this year adjusting to my new 94.4% has been challenging. It's my fault completely as I was just so devastated and checked out from EVERYTHING for two weeks leaving my customers in the dark no response. Anyway I've been in the process of fixing this and making it right for my customers at a huge loss financially. But now I've just reached breaking point. After being in minus of over $1000 owed to ebay for item not recieved requests (like a **bleep** load of them) I've finally paid ebay back. Then today I post a parcel RIGHT AT THE END OF THE DAY to a customer who has brought 4 expensive items from me coming to a total of just under $1000. I combined all four orders into one and sent it at closing time this arvo at post office Anyway early this evening about two hours after I posted it! I've recieved a message from her saying there are items missing from her package and making comme t about the tiffany and co bracelet not being marked and having no box which is not true. Anyway I'm just sitting here scratching my head trying to figure out what the **bleep**nis going on?? Is she trying to scam me but is just really bad at it?? Or **bleep**.. I know my seller rating is down Its obvious because all of a sudden I have an increased number of unfair claims. I knew I was at risk of with my feedback score. I don't even know what I'm asking for... some advice maybe or just conformation I'm getting scammed perhaps I've checked there pages nothing to alarming but what the he'll is going on.