Problem of downloading lecture notes

Hi,recently I can only open lecture notes by wet browser,which is very inconvenient.It fails to send it to kindle or iBooks even WPS after downloading.Is there a problem?Additionally,I’d like to donote,cause what you offer to me to learn ACCA is of great help,lectures and notes are more clear and understandable than many educational organizations (of course,they charge a lot)in my country.But I don’t have a visa now,is there a possibility for you to add more ways of payment in the future ?Like Alipay.I’ve said so much,many thanks for opentuition ??????