Poor service all round.

First of all, they say you can apply for a credit card increase online - which you can't (I have logged into the website numerous time to see where I can apply.) THEN I tried the USSD code banking, and I managed to fill out an application, but I never received the SMS as it said I would. I then phoned African Bank, and they took my details and said they can't offer me an increase, but they can offer me a loan, but I have to go to a branch to finalize the offer. I am not interested in a loan and they can't help me with an increase. BUT nobody can tell me WHY I don't qualify for an increase. I have been using my credit card since 2016, never missed a payment and pay on time, every time. I am currently on holiday - and I don't travel with my payslips, proof of residence and bank statements. I don't understand - they have phoned me last year to confirm that my details are still the same? The website is so tragic, I can't even buy airtime. And the USSD banking says my number is invalid. I am definitely paying up and closing my account ASAP.