From good service to disgusting service

I think it's time I change the ISP to Rain or something you guys service has become worse, calls are not answered...care to explain what happened to my data???? Why don't i have my carried over data???????? every now and then i either complain about slow network or data disappearing. Sonic used to be the best even referred many people to you back in 2019 but now it seems you're overwhelmed. If this is not sorted out please cancel the contract and tell me if I should throw away ur useless router or u'll collect it?