You have to give MG about a month. If in a few weeks you don't hear from them, and I would email first, then certainly you could do a chargeback. But I would advise you to give it a little time and email your concerns. MG used to refund your money if you weren't happy. They won't do that anymore? I haven't used them in a long time well if you look a few posts up you will see why. Same deal my emails were not responded to so I asked for a cancellation and got it.
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"Every day is a new day I am thankful for every breath I take, I won't take it for granted so I learn from my mistakes. So I trust in love, it gives me peace of mind." POD