Recommendation for a drain cleaning company

In Dublin 8 where I won't have to sell a kidney to pay for it?

We're the third house from the end of a terrace. A month ago our downstairs toilet was draining slowly so I checked the shores to find them bunged up. We have three new inspection chutes in a row (don't know what they're called) which were fitted during house renovations three years ago. After the third one there's a right turn which leads to the original shore. House was built in 1847. This shore then leads out into the back lane. I rodded it and managed to clear it but I couldn't get the rod into the right angle carrying the waste into the lane as the shore was too narrow.

Last night I saw the water level had risen in the drain under the kitchen window so I opened the old shore to have a look and it was full :eek:. I tried rodding it again and got the level halfway down but it needs professionals to maybe jet it or something. Is it possible that we are getting everyone else's waste coming through our drains? I fished out baby/hygiene/face wipes from the shore last time and we don't use these at all. There's only two of us in the house and we're in work all day. We couldn't possibly produce the amount of waste that was in the shore . Our neighbour two doors away was also having problems with her shores.

So, back to the original question! Can anyone recommend a drain clearing company that won't cost too much?