At the beginning of November 2021 I was sold an O2 sim-only deal through a third party called Sure Telecommunications Ltd - the signal was terrible, to non-existent at my home/home office. I patiently communicated multiple times with Surecomm for 5 weeks, to try and get it fixed, including waiting for some work to be done to an O2 mast nearby, but nothing improved. I work from home, so the huge amount of stress, and loss of earnings became too much to continue waiting for things to improve, so after five weeks I requested my pac code from O2 and went with EE who do thankfully have a genuinely good signal in my area. Unfortunately I had already signed my contract with O2, when I was subsequently told by one person from Surecomm that the O2 signal was actually poor in my area. I also received this same information from three separate agents at O2, after I had already been sold the O2 service via Surecomm. As a result of this situation, O2 have subsequently charged me £1085 for early termination fees from my contract. I have queried this several times, both speaking to, and writing to the O2 complaints department, but they said I had signed a contract with them through a third party and sadly there was nothing they can do to help me with this situation. Surecomm over charged me from day one, and mis-sold me this O2 product on the promise it would work, with good signal in my area, and it didn’t. The accumulative cost to me, including being overcharged by Surecom, not fulfilling the previously promised payment of the early termination fees from my last provider BT, loss of earnings, having to invest in a pay as you go phone to ensure I could continue my work from home, Surecomm’s £250 termination fees and O2’s termination fees of £1085 - comes to a total of just under £2000. I am very disappointed that O2 allow a third party company called Surecomm to sell services in such a dishonest and inaccurate way, that has ultimately resulted in an incredibly expensive and infinitely negative situation for me.