The worst customer service ever

The worst customer service ever! I've been a customer for a few years now upgraded my contracts a few times always had insurance on my devices.Which since proved to be useless.After 1 of my upgrades and a claim of one of my devices.Old details were never changed to the new devices on my insurance policy.Im currently sitting with 2broken devices which can't be fixed despite having had insurance for years.It took me over 2years to get them to replace one of my phones the last time due to this issues.After which they promised me that everything was fixed n all the correct devices were cover under my policy but here i am again. I went to the store December after my tablet accidentally fell to have it booked in and was told "It doesn't look like it's covered".Ive been going back and forward to the store ever since, phoning the manager(he keeps promising to get back to me and never does), trying to get assistance. Everything to no avail. They simply couldn't care less. I'm so disappointed and anger.