Particulate filter C30

Hello dear Volvo community, my problem exists only in a similar way already than Theard, so I get another one. The problem is a little longer. It started with my C30 not accelerating any more, then I went to a workshop and had the fault memory read out, then it came out that there is something with the particle filter, which was then cleaned, during a test drive was then noticed that the car accelerated uncontrollably, because the oil level of itself It’s very hard to get an appointment, so they built me a new sensor behind the particulate filter, renewed a diesel line, and replayed a system update for me. Since then, the car has been running wonderfully again, just since the weekend it hasn’t accelerated again, and I guess it’s the particulate filter again, I’ve been working with Volvo anger ufen and they thought that the cost will amount to 130€. Now I wonder if it will be cheaper, because this amount actually seems to me to be quite high, because the other repair was not without it. I would be happy if someone had any idea what it might cost.