Hi Juan. You say “if we speak to the strata manager” are actually just verbally telling him something? If so, can I suggest you back up any conversation with an email starting with “further to our phone call of this morning” then restate what you had told him. Them, if he passes on the wrong or incomplete information, you can then send the email starting “please refer to my email of xx/xx/xx…..”. This is how I have dealt with our SM. Has everything gone smoothly with this method? No. But I have it all in writing. I ask them to explain themselves. And then have them come grovelling, making excuses etc. But then the work gets done and alls well. Until the next time and the process starts again. But if you only have a “verbal” it’s your word against his.
Get the paper trail happening. It’s the way to go.