Pathetic service on home loan bond

I have been dealing with Standard Bank for 2 months regarding a bond loan to purchase a property, I sent them all the required documents including the offer to purchase and everything is agreed, Standard bank even send an evaluator to assess the property and everything is going fine, then they get property description wrong then require all sorts of additional documents which they receive then after we have agreed everything, signed everything, I have even agreed to their insurance and even paid transfer costs, then after 2 months they say they can not approve the bond because they are over exposed in that complex, now im stranded as I have already put in a notice where i currently recide to move out and move in to the new property on 1 April, now i have to start the whole process again, sort out all the refunds which will take further time delaying me still. It is just surprising how they approved the bond in the first place, even sent an evaluator to the correct adress and everything is approved then come back after 2 months and say they are over exposed, why didn't they notice that at the very beginning? this is just pathetic.