1 Week after fixed exchange and more problems!

Hi, last weekend on the 26th-27th there were problems again with the internet. That was supposedly upgraded the previous weekend. I would say I received about 10 sms's saying your service has been upgraded at the time of the exchange being FIXED. With line speeds going up to 200kb/s for 2mb line. Thats great I was quite happy about that! But now it seems after last weekend it doesnt go higher than 140kb/s. If we were to be technical about upgrades I would say this is an downgrade of service. And again I am paying for a service I am not getting. I am not happy about this.