How to apologize for not replying?
Hello I recently got into a language program but I haven't been able to reply to messages lately because I was away in London and didn't have time or proper service. Can someone tell me how to say something along the lines of "I'm sorry to anyone who has messaged me recently and I haven't replied. I've been in London the past month and haven't had much time to reply. I hope we can become good friends in the future!"