Inconsistent installation of burglar bars

I had my house recently kitted out with maxidor, only to find that the burglar bars were installed inconsistently not allowing me to install blinds. Spacing between window and bar and after bar was different for each window and the space after the bar was not sufficient for blinds to be installed. I asked for the bars to be reinstalled and after a long wait I was told I would have to pay for it. With many households opting for blinds I find it odd that such a big company could not take into account that blinds may be fitted (or atleast ask the customer) and have the bars fitted correctly the first time with sufficient spacing and with consistency.