High increment on my home loan

This is for the second time I am writing this review. I am not happy about Standard bank service infact I don't know what to do or where to go for help. I bought a house 2021 which I was initially paying R 5400.00 by end of last year my bond increased to R 7060.00. When I bought this house they checked my affordability and approved the loan based on what I can afford. I thought my home loan was fixed and I fee such information should be disclosed to customer's when buying a house whether they want to fix their bond or not which was not the case. I have been trying to fix my bond, called Standard Bank several times to see if there's any way I can fix or reduce my bond installment because I am unable to afford this amount anymore but with no luck. Instead I was advised by their agents that if I fix my bond I would pay more than what I am already paying. I ended up reversing my debit order twice which led my account to be in arrear's. Without any communication Standard Bank increased my Bond to R 7449.00 without any communication and I was told it's because of the arrear's amount which I still need to settle in full . First I need to know does Standard Bank evaluate the value of the houses after they have been bought. The house is not worth the amount that I'm currently paying. The amount that I am being charged is now almost my whole salary. How am I supposed to carry on with my living expenses. I feel like Standard Bank is failing me, I have been trying to communicate, make arrangements but I am not winning

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