Not intending on being rude here, but if you only have one lens, how did the hair get onto the sensor?
I am not sure how quick Curry's are, but perhaps you should not mention that the sensor has been cleaned, just that the Focus Confirmation Points, (not just Auto-Focus points) are suddenly a lot dimmer than they were previously, and unusable because of this.
And not intending on being patronising here, but when I started to look into getting a DSLR, one of the nice chaps in the shops took me through a simple way of reducing the chance of getting dust and dirt into the camera, they didn't see what all the fuss was about, with these sensor vibrating things that are meant to shake off the dirt, their opinion was it shouldn't be getting in there.
When you eventually get another lens (I am assuming that you keep your 1 lens on the camera all the time here), try taking the lens of in the following manner. Obviously, turn your back to the wind first. With the camera at a good length on the strap around your kneck (for confidence!) point the lens down towards the ground. Take the lens going on (or the cap), and loosen it, so it comes off the lens cap with one hand. I take the lens on the camera in my right hand, and press the lens release with my left. Then, pick the new lens up with the left, remove the old lens with the right, and at the same time swap them over. Putting the old lens onto the cap should be childs-play, don't worry about screwing it in. Offer the new lens up to the camera, so there is very little time that the hole is open to the elements. Once you are comfortable that the old lens in your right hand is not going to fall over and roll away, take your right hand back to the camera, line up the lens without rushing, and rotate it into the slot. Once it has clicked into place, then you can sort out the old lens, but screwing the cap on.
That is how I do it, I suspect that some people might even advocate performing it in two stages, putting the full front-cap onto the camera, then off again.