I found Homeseal off Kijiji and asked them to come and blow out my dryer vent as the dryer wasn't drying the clothes as it was blocked. We discussed that they could blow it or clean it out via the attic. They came the next day as scheduled and put in tool into the foil tube that allows the dryer to vent. They cut a hole in it, why not take it off you ask, and then taped it back up.
I paid and they left promptly after assuring me that they would email me the invoice the next day.
The dryer didn't dry the clothes any better, and the tape blew off and the lint blew through my house (top level dryer) and then the clothes started to dry.
A couple of issues: we talked about them going into the attic to clear the blockage, once there they assured me that blowing it would be the best way. I didn't get a copy of my invoice. I called a couple times the first week. Daily the second week. The third week I put in requests daily via the web site, called almost daily and then called 5 times in a rows. During this, I spoke to them a couple of times and they explained, as others here have said, it's their busiest season and I didn't get the invoice. I needed the invoice to get compensated for the work done, I had to pretty much stalk them to get it.
My advise, stay clear. I paid for a service that didn't fix the issue and then couldn't get the invoice. I'm guessing they likely do not remit the taxes so they don't give invoices.