Mr Wattson had no choice in health care.
After weeks of excruciating pain, Mark Wattson was understandably relieved to have his appendix taken out.
Doctors told him the operation was a success and he was sent home.
But only a month later the 35-year-old collapsed in agony and had to be taken back to Great Western Hospital in Swindon by ambulance.
Mark Wattson, 35, from Swindon may have been the victim of botched surgery after he had to have his appendix removed twice
To his shock, surgeons from the same team told him that not only was his appendix still inside him, but it had ruptured - a potentially fatal complication.
In a second operation it was finally removed, leaving Mr Wattson fearing another organ might have been taken out during the first procedure.
The blunder has left Mr Wattson jobless, as bosses at the shop where he worked did not believe his story and sacked him.
Mr Wattson told of the moment he realised there had been a serious mistake.
'I was lying on a stretcher in terrible pain and a doctor came up to me and said that my appendix had burst,' he said.
'I couldn't believe what I was hearing. I told these people I had my appendix out just four weeks earlier but there it was on the scanner screen for all to see.
'I thought, "What the hell did they slice me open for in the first place?"
'I feel that if the surgery had been done correctly in the first place I wouldn't be in the mess I am today. I'm disgusted by the whole experience.'
Mr Wattson first went under the knife on July 7 after experiencing severe abdominal pain for several weeks. He was discharged but exactly a month later he had to dial 999 after collapsing in agony.
Mr Wattson was readmitted to the Great Western Hospital in Swindon after his appendix ruptured
Following the second operation his incision became infected and he was admitted to hospital for a third time for treatment.
He said: 'I had a temporary job at a sports shop but when I took in two medical certificates saying I had my appendix out twice they didn't believe me.
'Now I'm helpless. I can't go out and find a job, I can't go to interviews, I can barely walk and am in constant pain. Before the first operation they told me I had to have my appendix removed and when I woke up afterwards they said it had been a complete success.
'But then I keeled over in agony one month later and when they did some tests at the hospital we could see the appendix was still there on the scans.
'As far as I was aware they took my appendix out and no one told me any different.
'I have no idea what they did take out, but I want to find out what went wrong.'
A spokesman for Great Western Hospital confirmed that a representative had met Mr Wattson and that an investigation had been started.
He was unable to confirm what, if anything, was removed in the first operation.
Paul Gearing, deputy general manager for general surgery at Great Western Hospital NHS Trust, said: 'We are unable to comment on individual cases.
'However, we would like to apologise if Mr Wattson felt dissatisfied with the care he received at Great Western Hospital.'