Over 2 months fighting to get a refund back.

I bought an annual subscription for an Adobe cloud from the salesperson on the phone. 
She  lied to me and misled me with the information.

I had to pay for a yearly subscription and she forced me to get an additional AI software which I didn't need to complete the offer. 
 However on my Adobe account there was a 50 percent subscription offer and option to pay monthly, 

I called Adobe customer service straight away and cancelled the subscription and signed for a monthly option. 
I am desperately trying to get my money back £530 for the cancelled subscription since the 20th of March. 
Made endless amounts of phone calls and was promised a refund on the phone and in emails from Adobe staff. 
But it has never been finalized. 
 

It is utterly disgraceful, they stole my money and I am loosing my hope to ever get it back. 
 

Please help me with any suggestions on how to get justice from this awful company that treats their customers so poorly.