Money ****** from my account

On the 29th of Feb 2016 I received a sms stating that money was reserved for a purchase i amediatly contacted the bank and informed them that i did not purchase anything from paypal they must not let the money go through but they failed to do so. I had to call every day requesting a form they said they will send eventually they send the form i filled it in send it back to them by the 10th of March 2016 I waited for 5 working days after hearing nothing i phoned again and they informed me that it takes 7 working days which i waited for after no response i phoned again i they told me that the form was wrong bear in mind it was the form they send me. They send me the other form i completed the form and emailed it back to them now its about two week later again now they tell me i must resubmit the form again. This is not my mistake and feel the bank must sort this out now