I canceled their contract I had with them for over 2 years

I canceled their contract I had with them for over 2 years. Contacted them on the 5 September noticing that I am terminating my contract which was pay as you go .I paid them on the 22 September for September .while my contract was ending on the 30 September. On the 30 September midnight the withdrew their services .on the 25th October they debited me for services they did not render .I called them .the agent said the debit order its for September. Meaning they debited me twice .I want.my.money I send them.email they did not respond I am attaching my last invoice as proof [file=20382_3bdcf9e83c5cf303b92bff117711e1b6__https://s3-eu-west-1.amazonaws.com/pslbs/lhc-files/93eb-user-files/889feb8d270ff14faad0895ba54dd2f7.jpeg?X-Amz-Content-Sha256=UNSIGNED-PAYLOADandX-Amz-Algorithm=AWS4-HMAC-SHA256andX-Amz-Credential=AKIA5DGWZC5MLFWEG3MCpercent2F***6percent2Feu-west-1percent2Fs3percent2Faws4_requestandX-Amz-Date=***6T173420ZandX-Amz-SignedHeaders=hostandX-Amz-Expires=1200andX-Amz-Signature=e40cabb***b36ba48ea10350c8e5f75ebfd686b76f343509eeb9d0 link=http://hellopeter.kobliat.com/dialog/download/20382]