I am in the process of buying a property.

Have a process server physically give the notice of non renewal. and as Teresa said, try calling from a different number

You may end up needing to go through the whole foreclosure process which can take a lot of time and cost a lot of money, and you may end up getting the property back in much worse condition than when you sold it, potentially with a squatter in it and months of lost rent, and in a worst case scenario you will be in a much worse position than if you had just sold it outright. 

Our house is in the R2 zone (4 blocks off main) and the process to transfer the permit back in March was a breeze.

At this point, we were literally scared and feared that if ABC Baltimore refused to buy back the house and then we would have to go through a long and expensive legal process.

But it is time to scale back to give us more time to focus on our family and some other projects.So now we are in the process of selling 9 properties in Colorado and 7 properties in Ohio.

While many of these issues are important considerations and should not be ignored or overlooked, there are other more crucial criteria that you must question and evaluate first.The critical risk criteria that you must review and evaluate prior to making your final decision on which 1031 Exchange Qualified Intermediary to retain includes, but is not limited to, the following areas:Technical capability of the 1031 Exchange Qualified IntermediaryInternal processes and audit controls to safeguard your 1031 Exchange funds and assetsUse of Qualified Trust Accounts or Qualified Escrow AccountsDecision criteria and guidelines for investment of your 1031 Exchange fundsProtection from potential errors or omissions by the Qualified Intermediary (E&O Insurance) Protection from potential theft or embezzlement of 1031 Exchange funds (Fidelity Bond) An experienced and professional 1031 Exchange Qualified Intermediary will understand these concerns and should be happy to discuss these crucial issues with you.

I hope that makes sense as i'm trying to better understand how to go through this process the right way and increase my chances of approval. 

I've never been through this process and it's my biggest fear because it seems to be SO costly!

They make money on every step of the process, and there's a lot of incentive for them to exaggerate what your returns will be.