RUSTING OF PRODUCT & BAD AFTER SALES

We contacted Maxidor 3 weeks ago, and requested someone from their technical team to come out and view the rusting on 90% of the Maxidor products that were installed. Neville came out and took photos of the rust as well as pointed out to me that the one unit is not installed properly and is easy to break and gain access into the entire household, which is defeating the object of having burglar bars. The units are only 3 years old, and yet they are rusting. We can not close some of the units properly, neither is the slam lock working due to the rust. Some of the *****s are also rusting.<br> Chanel was contacted and I was told that she would get back to me by end of day yesterday, 05/06/2015, she did not contact me and I am still awaiting her reply after I phoned her this morning and sent her a reminder to get back to me.<br> If Maxidor claim that the units are coated with certain chemicals why are they rusting????<br> They clearly know that they are at fault here, and are just passing the buck and do not want to sort out the problem It has taken a month already to sort this out. They received payment 3 years ago and ALL these products have a 5 year guarantee.<br> SOME ANSWERS PLEASE!