Hi, I have the IW numbers on each one. Who will i ring for the forms? What will these achieve?

Hi, I today recieved 4 letters from Marstons high court enforcement rubbish about 4 parking fines based on a vehicle i sold last february. The letters state the following: 26/02/10 fine: £80 / Fees: £72.58 and vat total £166.82 17/03/10 fine: £80 / fees: £290.30 and vat total £428.08 25/02/10 fine: £110 / fees £319.18 and vat total £492.74 28/0210 fine: £110 / fees £319.18 and vat total £492.74 These are all for a vehicle i sold early february however i used a post office form instead of V5 as lost. Therefore i got a letter when it was re-registered staing that i need to pay a fine which i promptly did. Never got a letter stating change of ownership however as i got the fine i assumed it had gone through and that was end of it. Year on i get these letters and after speaking to Marstons who were very rude basically saying they will force entry and TAKE my goods to cover it. Spoke to DVLA who also said because i dont have the re-registering document i cant do anything although they confirmed i am not the owner. They would not help me any further and after repeating myself like a parrot a thousand times they ended up hanging up on me. I need to know what to do next. Marstons are claiming they will force entry whether i am here or not and take my possessions for fines which are not even mine. The letter says they have a WARRANT OF EXECUTION from northampton council. Also the fines were done in the isle of wight when i live in dorset and have never been to the isle of wight in my life. If i cannot prove that the vehicle is someone else then i will pay the fine but there is no way im paying these charges when i have only just been informed of this (been living here for a year) they have been sending the original letters to my old address apparently and that i should have informed them of my address change... why would i ring a random bailiff company to let them know of my address change incase some fines might come through in the future Help!