Invitation letter about sponsor an Egyptian ?

Can someone please help me. Does anyone know about invitation letter about sponsor an Egyptian to come to the UK? I am married to an Egyptian, I have recently send an invitation letter to the British embassy in Cairo. Unfortunately they send all my documents back saying they no longer processed in Cairo. They say now applications are now assessed at the British embassy in Abu Dhabi. This is really confusing me. I hope someone can give me advice about what to do. Thank you.

Dear
First of all your marriage paper is registered or not then your husband make a visa to use then you send the papers to use embassy &he register the paper again in dubai then he will come to you for any other details ************* do not hesitate to ask

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