Broken boot and unprofessional service

I had my tracking device installed today on my BMW 218D 2021 , which is brand new ans boot has been working 100% , a guy from Altec Netstar ,by a guy who didn’t introduce himself, the guy was unprofessional, left without explaining how the device he connected works , then only to find out he left me with a broken boot , he came back and said he fixed it only for me to realise he banged it close and they ended up leaving it just like that saying they will send me a technician from BMW tomorrow, they don’t care about customer service, even their call center agents are rude and very uncourteous , I don’t know what did I do to deserve such treatment? I am heavily pained as my car is hardly on 500 km’s but I’m stuck with a broken boot that can’t close .