I have contacted customer service on the phone: they hung-up on me.

I tried by email: they just say the problem is solved for them, so they close the email request.

great, except, nothing has been solved.

Proximus sends a first invoice that mentions:

• - 27€ for changing subscription type
• - 40.21€ employer contribution.
• 40.21€ bill for the month.

Result: I have a positive balance of 27.€.
Logical so far.

I then receive a second invoice (why?) that mentions that 40 are needed to be paid. From this 40€, they substract the positive balance of 27 so around 13€ to be paid left.

So far, no explanations why the 40€ bill is being asked twice. Especially as the contribution from employer should cover it already.

When I try to explain that the bill has been paid already by the employer, as indicated in the invoice, they just say they received nothing from my bank account si it is considered unpaid.

Except that if my employer is paying, OF COURSE the money won’t be coming from my personal bank account. 

I tried to active the contribution from employer with around 6 calls and 3 email request, nothing works.

WOuld not recommend Proximus: if you have the slightest issue, they do not seem to be capable of helping or fixing anything. Customer service is also extremely rude and not willing to support.