Mail & Guardian not honouring Kindle subscription

I have had a Amazon Kindle subscription to the Mail & Guardian for many years. Three March issues--13 20 and 27--have not downloaded to my Kindle. But the money is still debited from my account. Amazon tells me that the "publisher" (the M&G) is not uploading the issues. I have been told repeatedly via email (Douglas White) that they are having technical problems. One week I can understand but three? NO! M&G, get your act together!