Inner tube

I have had a slow puncture in the off side rear of my chunky tyres. This last week it has been going down within day or two when before it took ten days or more. I had an inner tube in my stores. Jacked Degsy up and put an axles stand under the rear off side axle. I took the wheel off and it together with the inner tube and took them up to the Landy garage. I left it with them and said I would back in a few days. I went back on the Thursday and the tyre was ready however the inner tube was on the top of the tyre. The chap said it was the wrong sort. He still only charged me a tenner and I got an inner tube as well.