Discovery miles lack transparency and accountibility

I have not been allocated the Discovery Miles I am meant to receive based on my multiplier that I have. I have not received the promised miles for the past month. I have called Discovery three times asking for clarification. After the first two calls no statement arrived. In fact none of the people I spoke to seemed entirely sure at what point miles were allocated. After the third call I received 8 statements which were all the same and in immensely large tiff files. (I ask you, who sends statements out in enormous tiff files that take a long time to download?) Nonetheless, these statements show nothing except monthly allocations and deductions over 14 years. There are no explanations or any breakdown of miles allocated of any kind. The statements just sent out provide monthly amounts of miles allocated for over ten years, despite the fact that I requested a detailed breakdown of miles allocated for each purchase for only the past two two months. Is that such a difficult request to comply with? A breakdown of only the past two months of miles allocated to each purchase. Where is the transparency in this Discovery miles scheme? Why is the multiplier used for the shop partners of Discovery not shown on the statement? If there is any desire to be transparent then Discovery miles allocated using the multiplier for partner shops should be shown on the statement. At the very least shoppers should have easy access to the Discovery miles allocated for each purchase.