Bad customer service

I took my ring to American Swiss in Hatfield, Burnett Street on 2018 October 05 for cleaning and I was advised that it takes 7 working days. To date i have still not received my ring back! I triend making follow up with them by going to the store and calling them but it seems like nobody knows why it's taking so long. I asked the ladies to give me a call as soon as they have an update and a lady called me on 2018-10-25 and said that the lady that was supposed to deliver the ring couldn't make it because she had a funeral! Which according to me is a very lousy explanation as if I'm stupid or illiterate! I want my ring back,!!!! Today i call they say they are still waiting for the supplier to deliver. Can someone please reach out to me and give me a better explanation! I asked for the manager's contact number or email address but they refused to give them to me. I am very frustrated and angry! :(