The Italian club have stated their intention to pursue the Bulgarian striker for funds to cover the travel expenses outlaid for him during their chase to sign him in the summer
The former Manchester United striker incurred the wrath of the Tuscan club when, they claimed, he broke an agreement with them in order to consider an offer from Juventus before eventually staying in England to sign for the Cottagers.
The club is still raging over the incident which is set to continue as the club plan to seek compensation for the whole affair.
"We will ask his attorney for a refund for the tickets paid," Prade told Radio Blu.
The director then took the chance to lambast the player once again before hinting that in the January market La Viola might consider buying another forward.
"I'm glad he did not arrive in the end. It is better this way. In my 25 year career in this business, I have never seen anything like this," he continued.
"We will see if there is something in the market to our liking. We are not desperate for a new striker, for we have Luca Toni now who will be a real asset on and off the field.
"We have not had any contact with Giuseppe Rossi, despite the rumours."
Regarding star player Stevan Jovetic, who has been linked to a host of clubs, Prade is not fearful of losing him, despite admitting that the situation will have to be reassessed next summer.
"I've never been afraid of losing him. Until June, the case is closed, and only then will we evaluate the situation again," he concluded.