Analyze the sentiment expressed in the tweet. Is it positive, negative, or neutral? Explain the sentiment in relation to the stock mentioned.
TWEET: "@amazon  , It's very unfortunate but I am very disgusted at the delivery service as provided by u guys I don't know… https://t.co/dnG9qVfepO

" STOCK: Amazon DATE: 20/10/2018
Sentiment: (Provide sentiment here)
Explanation: The tweet sentiment is related to the stock mentioned, and it's important to interpret the context. The LSTM polarity score is -1 and the TextBlob polarity score is -0.825.