Unjustified data bundle charges (€597.43) from a repeating pattern of 59 MB units

On 25 July 2026, my account was charged €597.43 for 9,776 MB of mobile data usage. Looking at the itemized breakdown, I see a very specific and repeating pattern: continuous units of almost exactly 59 MB, roughly once per minute, over more than 40 minutes straight.

What makes this especially notable: the same pattern already occurred on 19 July 2026 (from 19:12 to 19:56, 44 minutes), that time still within my bundle and therefore free. On 25 July (19:44 to 20:27), however, this pushed me outside my bundle, and each 59 MB unit was billed separately at €8.79.

I was not actively using my phone during either of these windows. A sustained data stream of roughly 1 MB per second, at nearly the same time in the evening on two separate dates, doesn't look like normal usage to me.

I also notice that around 20:09–20:14 on 25 July, several identical 59 MB units alternate between €0.00 and roughly €8.79 at the same or adjacent timestamps — which looks to me like an error in the billing right around the point my bundle ran out.

I've seen this exact pattern (repeated ~59 MB units billed at €8.79 each) mentioned in other posts on this forum, so I suspect this may be a broader issue.

I've already filed a formal complaint by email with the full logs attached, and my number is currently blocked as a precaution. Could someone from Simyo Webcare take a look at this quickly? I'm happy to share my account details via private message.