UPTION Android App Has Been Inaccessible for a Month Without Solution

I have been unable to access the UPTION application on my Android phone for about a month. When I try to log in, the app tells me that I am unreachable and asks me to contact them via e‑mail. I follow this instruction and send messages, but I still do not receive a final or clear response, and the access problem continues. I entered my phone number into the system and tried again, but I encountered the same problem. I sent many messages for support, yet I did not receive any satisfactory feedback. This situation makes me think that the company has no effective customer service and creates serious hesitation for me about doing business with this bank in the future. I request that my access problem to the UPTION application be resolved as soon as possible and that my messages be answered clearly and in writing, so that I can continue to use your services with confidence.