After several years of operation, there are now problems. This can happen, but it must be solved quickly. Unfortunately, however, the problem resolution has been dragging on for a year.
The company is accommodating and does not charge maintenance costs, but necessary material is not delivered, promises are not kept. A great pity.
Now I am considering replacing the system and switching to a competitor.
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Translation
Comment from URSPRUNG KG: 
thank you very much for your feedback. I can understand your anger and would like to comment briefly on this issue:
So far, no service has been carried out on your 10-year-old plant from our side. Therefore, we had contacted you to check the system once as a precautionary measure for function, hygiene and especially for wear parts. The costs as well as the service were discussed with you in advance and then also requested by you.
According to the service report, which was also signed by you on site, the following work was carried out:
Venturi valve checked and cleaned; leakage, control, overflow protection and float checked; resin bed disinfection carried out; water equipment and pH value checked.
Your plant is working perfectly. For this reason, we have not changed any seals, so that we do not make an issue where there is none. However, if we had found on site that the seals were badly worn and should be replaced, we would have performed this work at no additional cost to you.
Our service fee includes both travel and labor costs. The labor cost includes not only that of our mechanic but also our office staff for scheduling and following up on service appointments. It is very important for us to find a suitable appointment with our customers, as well as with you, so that we can avoid inconveniences and unnecessary waiting times. This procedure is of course a bit more time-consuming, but in our opinion it is part of a professional service. In addition, you can always order salt from us at the service, which we will bring directly to your plant.
For these reasons our service flat rate was created, which is the same for all customers. Thus we can offer, from our point of view, a very fair and stable service price, which is more than marketable.
It is a great pity that a more than bad evaluation is given right away without contacting us first, so that we can also comment on it. It is also a pity that points are evaluated very badly, which have nothing to do with the plant itself.
Of course, you are entitled to your own personal opinion and have the right to rate our service, from your point of view, as Poor. Nevertheless, we would be pleased if you, insofar as you are naturally satisfied with your system, could adjust the points that have nothing to do with the service itself (for example, benefit of the system or advice), so that our customers can also form a fairly evaluated picture of us and our systems.
We would also be happy to discuss this over the phone if you would like. You can reach me personally at any time on 07303 9290681.
Yours sincerely,
Nadine Feldmann (Management)