Does not work with metal doors, impossible hotline!

In the pack is outside "For PVC, UPVC, metal", and the phrase "for every door, wall ... suitable". Without small print without star ... but not true! I have installed the first cat flap, not a cat could be programmed, phoned Petsafe, get new flap and the same game again. Then asked an employee in what door I had installed the door. And the answer is "metal" he said, then yes, the radio signal is disturbed and it can not function. When I pointed out to him on it, that the package but promises that it would work even when metal came answers like "Well, that is, only so that they can be installed even with metal doors, but not that it works well." or "Well, if a new detergent Ariel brings out, with" even softer wash "not believable ego, too." Impudence! And he pointed out to me that in the middle of the instructions for use, the recommendation would be to find, check the door before installation in a metal door. But again, no reference ala "may simply be that it does not work with metal." And I may not rely on the information on the package as a buyer? If not Petsafe!
His suggestions: give back door or a wooden frame around the DOOR BUILDING. Goes with me not because I have crossbeams in the door. His recommendation: 50cm x 50cm wood frame drum rum build. 1. How does this matter? 2. I buy a Sauteurs cat flap and then have to go carpenters, so he thought, "then there would be a small chance that they might still work"?
I have passed on the case, after consultation with the Consumer Protection my legal expenses insurance and can only advise every product PetSafe to buy!