I’ve been a customer of [3] for 10 years, using three different phone lines with the same service. Unfortunately, my experience with their customer service has been extremely disappointing. For the same service, they charged different amounts for each SIM card: one was charged £12, and another £22, even though all were registered in my name and paid from my bank account. Despite numerous calls, I received no satisfactory explanation, and each time I called, I was bounced around between representatives with no resolution. After a decade of being a loyal customer, I decided to explore other options and found that other companies offer much better services at more competitive prices. I tried to resolve the issue with [3] again but ended up calling them nearly five times in a week, each time being redirected or disconnected. Even when visiting their branches, I was told to resolve issues over the phone, and they refused to help in person. Today, I’m completely fed up with [3]. When I asked to speak to a manager, the person I was connected with, named Mr. Z, was not only unhelpful but also extremely rude. Throughout the entire conversation, he failed to apologize for the inconvenience and instead started yelling and making excuses. In the end, he told me to create a new account, which was a completely unnecessary and frustrating step. I’ve decided to switch providers because [3] has proven to be untrustworthy and unprofessional. I strongly advise against using their services. My experience was extremely negative, and I feel that the management lacks the ability to address customer concerns effectively.