Internet Banking problems

I do not even want to give them 1 star. Have been struggling to get my mobile app working for 3 days and it is eventually working only to find that proof of payments can not be downloaded because according to the app there is no PDF reader installed on my phone despite the fact that I have 2 different PDF readers installed. So I turned to my internet banking on my PC for help only to find that I can not log in there either. Contact centre insists on operating through e-mails and screenshots of the problem rather than direct contact with me the client . Mails being sent back insinuating that the fault is with me, wrong credentials, not logged in etc. Send a mail asking for 2 proof of payment copies and only receive 2, have to ask again for the 3rd proof of payment. Can't even get that right!! I have never seen such pathetic service and I think I will be switching to another service provider.