Delayed warranty assessment

I logged in my Sumsung S6 Edge phone which is less than six months old for warranty assessment as it was not charging on Friday the 15th of January. I was promised that the assessment would be done by Wednesday the following week. I did a follow-up on Thursday only to be told that the assessment was not done and would be done by Monday next week as the Centre that deals with assessments is closed for stock-taking, something that I was never informed about when I submitted my phone. I am really disappointed with this kind of service.