Is amazon.co.uk Safe?

If I could give negative stars I would. Amazon customer service is appalling. Amazon has scammers in China operating on its Marketplace and simply doesn't seem to care. These scammers are advertising relatively expensive products with 3-4 weeks delivery time. On placing an order they respond with delivery shipped and tracking. Once the 3-4 weeks delivery time expires they send a message saying product isn't available with varying excuses. Of course by this time they've held you money for 3-4 weeks and it then takes a further 3 days or so for the refund via amazon to paid back to your account. I dread to think how many times this is happening on amazon and the total amount of money involved. When you arrange for a customer services call back from amazon you simply get a lowly call centre operative with zero interest in what's going on, stating idiotic things like "well your refund is being processed". Too low in the food chain to even understand the problem. When you ask to speak to a manager or raise a complaint against amazon you get the answer that it is not possible. Wow, get that! It's just not possible to raise a complaint against amazon!