Better than me
Better than me: I tried to cancel a "contract" (which I hadn't signed or agreed to by that point) on a phone they'd sent me (but had never arrived, Royal Mail had no trace of, Three wouldn't re-send, etc.), that I'd then reported to them as stolen (and had the IMEI / SIM blocked BY THEM) and it took weeks. They didn't mind setting up a Direct Debit and pouring money out of my account but weren't so hot on actually giving me the damn phone I was supposed to be signing up for, chasing up with the postal service, sending me another, checking if the damn phone was being used or not, or actually anything at all.
Apparently the parcel was lost in the post but they wanted ME to chase it up (er... no... not at my neighbours, not at my local post office, your problem - they didn't even have tracking on it because it was sent second-class parcel post). For all I know, someone stole it from my front door or the postman walked off with it, so I just reported it stolen (after 28 days waiting for delivery) and wanted them to send another. The phone (and, presumably, the contract inside the same box that they assumed I had "agreed to" by that point) was worth about tuppence.
I took what I consider to be vastly drastic action to cancel a £9.99 a month contract on something that I never received - I had to call my bank, explain the situation and after confirming that the transactions weren't for any delivered good or service (I'd had Three block the IMEI / SIM of the unarrived phone by then, so it was unusable even if I *DID* have it) THE BANK cancelled the Direct Debit and refunded ALL the payments I'd made on it.
Three threw a wobbler and kept repeatedly phoning me and telling me they wouldn't stop calling and threatened me with everything but were unwilling to follow through on their threats of breach-of-contract action (inviting them to court got a strange reaction because I think they assumed I wouldn't follow through with it - I even offered to initiate the action in small claims if they wanted) - strange that, seeing as I had no phone, service, or even SIM to show for holding my side of the contract and paying everything required. They called every 20 mins for about 4 days.
In the end, I advised every person who called me from them that I was recording time and date of the call because it was gathering evidence for my harassment claims. It didn't stop them but it made the conversations very much briefer each time. A few weeks later I got a letter from them saying how kind they were being by cancelling my contract for me and "refunding" my payments and "rescinding the charges for non-payment". Thankfully haven't heard from them since, and haven't used them either.
All I wanted was what I bloody ordered, or failing that, a fecking SIM on the contract I applied for - I'd have swallowed the cheapy feature-less phone that was thrown in free if they'd just sent me a replacement SIM on my £9.95 a month contract.