Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Still waiting on my refund!

I sent this back because after I had paid for postage, there was a new charge at the post office for shipping as the shipper only added about 71 cent for postage. I contacted the seller and they assured me I would be reimbursed but that has not happened yet. plus I thought there was a low rate for mailing books..but the postage due was over $7. and I had already paid around $3.